This material is for PGPSE / CSE students of AFTERSCHOOOL. PGPSE / CSE are free online programme - open for all - free for all - to promote entrepreneurship and social entrepreneurship PGPSE is for those who want to transform the world. It is different from MBA, BBA, CFA, CA,CS,ICWA and other traditional programmes. It is based on self certification and based on self learning and guidance by mentors. It is for those who want to be entrepreneurs and social changers. Let us work together. Our basic idea is that KNOWLEDGE IS FREE & AND SHARE IT WITH THE WORLD
This document discusses systems of equations and how to solve them. It defines a system of equations as a collection of two or more equations with the same set of unknown variables. It provides an example of a system involving candy and chocolate purchases. It then describes two methods for solving systems of equations: 1) the method of addition and subtraction, which eliminates one unknown; and 2) the method of substitution, which substitutes one equation into the other to obtain an equation with only one unknown. It notes that if a system contains more than two equations, it can be divided into separate systems of two equations each since all equations in the system are equal.
This document summarizes three methods for solving systems of linear equations: graphing, substitution, and elimination. It provides examples of solving systems of two equations using each method. Graphing involves plotting the lines defined by each equation on a coordinate plane and finding their point of intersection. Substitution involves isolating a variable in one equation and substituting it into the other equation. Elimination involves adding or subtracting multiples of equations to remove a variable and solve for the remaining variable.
This document provides instruction on solving various types of equations, including quadratic equations, equations containing radicals, and equations that can be reduced to quadratic form. It includes examples of solving equations that are quadratic in form by rewriting them in standard form and substituting a variable, then solving the resulting quadratic equation. It also provides examples of solving equations containing radicals by isolating radicals and raising both sides of the equation to appropriate powers. Students are expected to learn to identify different equation types, select appropriate solution methods, and solve various quadratic and radical equations.
This document provides information about quadratic equations, including:
- Methods for solving quadratic equations like factoring, completing the square, and using the quadratic formula.
- Key terms like discriminant and nature of roots. The discriminant determines if the roots are real, equal, or imaginary.
- Examples of solving quadratic equations using different methods and finding related values like discriminant and roots.
The document provides instructions on factorizing quadratic equations. It begins by explaining what quadratic equations are and provides examples. It then discusses factorizing quadratics where the coefficient of x^2 is 1 by finding two numbers whose product is the last term and sum is the middle term. The document continues explaining how to factorize when the coefficient of x^2 is not 1 and predicts the signs of the factors based on the signs of the terms in the quadratic equation. It provides examples of factorizing different quadratic equations.
The document discusses linear pairs of equations in two variables. It defines a linear equation as one that can be written in the form ax + by + c = 0. It explains that a pair of linear equations can be solved either algebraically or graphically. The graphical method involves plotting the lines defined by each equation on a graph and analyzing their intersection. Parallel lines mean no solution, intersecting lines mean a unique solution, and coincident lines mean infinitely many solutions. Several examples are worked through to demonstrate these concepts.
Algebra is a branch of mathematics that studies structure, relations, and quantities. The quadratic formula provides a method for solving quadratic equations of the form ax^2 + bx + c = 0 by using the coefficients a, b, and c. There are three main methods for solving quadratic equations: factoring, completing the square, and using the quadratic formula.
This document discusses systems of equations and how to solve them. It defines a system of equations as a collection of two or more equations with the same set of unknown variables. It provides an example of a system involving candy and chocolate purchases. It then describes two methods for solving systems of equations: 1) the method of addition and subtraction, which eliminates one unknown; and 2) the method of substitution, which substitutes one equation into the other to obtain an equation with only one unknown. It notes that if a system contains more than two equations, it can be divided into separate systems of two equations each since all equations in the system are equal.
This document summarizes three methods for solving systems of linear equations: graphing, substitution, and elimination. It provides examples of solving systems of two equations using each method. Graphing involves plotting the lines defined by each equation on a coordinate plane and finding their point of intersection. Substitution involves isolating a variable in one equation and substituting it into the other equation. Elimination involves adding or subtracting multiples of equations to remove a variable and solve for the remaining variable.
This document provides instruction on solving various types of equations, including quadratic equations, equations containing radicals, and equations that can be reduced to quadratic form. It includes examples of solving equations that are quadratic in form by rewriting them in standard form and substituting a variable, then solving the resulting quadratic equation. It also provides examples of solving equations containing radicals by isolating radicals and raising both sides of the equation to appropriate powers. Students are expected to learn to identify different equation types, select appropriate solution methods, and solve various quadratic and radical equations.
This document provides information about quadratic equations, including:
- Methods for solving quadratic equations like factoring, completing the square, and using the quadratic formula.
- Key terms like discriminant and nature of roots. The discriminant determines if the roots are real, equal, or imaginary.
- Examples of solving quadratic equations using different methods and finding related values like discriminant and roots.
The document provides instructions on factorizing quadratic equations. It begins by explaining what quadratic equations are and provides examples. It then discusses factorizing quadratics where the coefficient of x^2 is 1 by finding two numbers whose product is the last term and sum is the middle term. The document continues explaining how to factorize when the coefficient of x^2 is not 1 and predicts the signs of the factors based on the signs of the terms in the quadratic equation. It provides examples of factorizing different quadratic equations.
The document discusses linear pairs of equations in two variables. It defines a linear equation as one that can be written in the form ax + by + c = 0. It explains that a pair of linear equations can be solved either algebraically or graphically. The graphical method involves plotting the lines defined by each equation on a graph and analyzing their intersection. Parallel lines mean no solution, intersecting lines mean a unique solution, and coincident lines mean infinitely many solutions. Several examples are worked through to demonstrate these concepts.
Algebra is a branch of mathematics that studies structure, relations, and quantities. The quadratic formula provides a method for solving quadratic equations of the form ax^2 + bx + c = 0 by using the coefficients a, b, and c. There are three main methods for solving quadratic equations: factoring, completing the square, and using the quadratic formula.
This document discusses solving systems of equations by elimination. It provides examples of eliminating a variable by adding or subtracting equations. The key steps are: 1) write the equations in standard form; 2) add or subtract the equations to eliminate one variable; 3) substitute the eliminated variable back into one equation to solve for the other variable. Checking the solution in both original equations verifies the correct solution was found.
The document discusses solving quadratic equations using various techniques like factoring, completing the square, and the quadratic formula. It provides examples of using these methods to solve equations in standard form. The quadratic formula is derived and explained. The concept of the discriminant is introduced and how it relates to the number and type of solutions. An example problem is worked through applying the Pythagorean theorem and quadratic formula to solve a real world word problem.
The document discusses the quadratic formula and how to use the discriminant to determine the number of solutions a quadratic equation has. It provides examples of calculating the discriminant for different quadratic equations and relating the discriminant to whether there are 0, 1, or 2 solutions graphically.
The document provides examples of solving linear and nonlinear inequalities algebraically and graphing their solution sets. For linear inequalities, the solutions are intervals of real numbers defined by the solutions to the corresponding equalities. For nonlinear inequalities, the solutions are unions of intervals where the factors of the corresponding equalities have the same sign. The document also demonstrates solving compound inequalities and inequalities involving rational expressions.
1. The document contains 13 multiple choice questions regarding inequalities and absolute values.
2. The questions require evaluating logical statements and determining if they are sufficient to answer whether given inequalities are true.
3. Detailed step-by-step working is shown for each question, identifying the reasoning for selecting the answer. Common mistakes are discussed to help understand the concepts.
This document provides a summary of basic algebra concepts for entrepreneurs and social entrepreneurship participants. It includes example algebra problems with step-by-step solutions on topics like equations, factors, exponents, and scientific notation. It also provides links to download additional educational resources on algebra, statistics, reasoning, and other relevant subjects.
This document defines and explains how to solve quadratic equations. A quadratic equation is an equation that can be written in the standard form ax^2 + bx + c = 0, where a, b, and c are real numbers and a is not equal to 0. There are several methods for solving quadratic equations covered in the document: factoring, taking the square root, completing the square, and using the quadratic formula. The discriminant, b^2 - 4ac, determines the number and type of solutions.
AS LEVEL QUADRATIC (CIE) EXPLAINED WITH EXAMPLE AND DIAGRAMSRACSOelimu
This document discusses completing the square to write quadratic equations in standard form. It explains how to write quadratics in the form (x - h)2 + k when the leading coefficient a is positive, negative, or not equal to 1. The standard form allows easily finding the vertex (h, k) and sketching the graph. It also covers using the discriminant to determine the number of roots, solving quadratic inequalities, and relating the sign of a to whether the graph opens up or down.
The document discusses techniques for combining fractions with opposite denominators. It explains that we can multiply the numerator and denominator by -1 to change the denominator to its opposite. It provides examples of switching fractions to their opposite denominators and combining fractions with opposite denominators by first switching one denominator so they are the same. It also discusses an alternative approach of pulling out a "-" from the denominator and passing it to the numerator when switching denominators, ensuring the leading term is positive for polynomial denominators.
This document provides examples and explanations of operations involving polynomials and rational expressions. It covers factoring polynomials, evaluating polynomial expressions, adding, subtracting, multiplying and dividing rational expressions, and simplifying complex fractions and expressions with radicals. Step-by-step solutions are shown for problems such as factoring expressions, evaluating polynomials for given values, combining like rational expressions, rationalizing denominators, and more. The document demonstrates various techniques for working with polynomials and rational expressions.
1. The document discusses rules and principles for working with negative numbers and algebraic expressions involving negative numbers.
2. Key ideas include defining negative multiplication, such as -3 × 2, as -6; establishing that the order of factors does not matter in negative multiplication, similar to positive numbers; and simplifying algebraic expressions by using properties such as x - (y - z) = x - y + z.
3. General principles are stated for adding and subtracting negative numbers, and techniques are described for simplifying algebraic expressions involving negative terms.
The document provides instructions for graphing and solving various types of quadratic equations. It defines standard form, vertex form, and intercept form of quadratics. It explains how to graph quadratics by finding the vertex and intercepts. Methods covered include factoring, taking square roots, completing the square, and using the quadratic formula. Examples are included to demonstrate each process.
The document discusses different methods for solving equations, including:
- Solving 1st and 2nd degree polynomial equations by setting them equal to 0 and using factoring or the quadratic formula.
- Solving rational equations by clearing all denominators using the lowest common denominator.
- Solving equations may require transforming them into polynomial equations first through methods like factoring or factoring by grouping.
This document provides instruction on solving algebraic equations that have variables on both sides. It begins with a review of solving equations with a variable on one side, such as 6x+4=28. It then demonstrates how to solve equations with variables on both sides through a step-by-step process of combining like terms, moving terms to one side of the equation, and then dividing both sides by the coefficient of the variable. Several examples are worked through and solutions are checked by substituting the solutions back into the original equations. The document concludes by providing additional practice problems for the student to solve.
This document provides an overview and activities on solving quadratic equations by factoring. It begins by defining quadratic equations and their standard form. Several activities are presented to practice identifying quadratic equations, rewriting them in standard form, and factoring trinomials of the form x^2 + bx + c. The final activity involves factoring quadratic equations to determine their roots. The document aims to build mastery of skills needed to solve quadratic equations using factoring techniques.
This document discusses solving simultaneous linear equations using the substitution method. It begins by defining linear equations and simultaneous equations. The substitution method is explained as expressing one variable in terms of the other and substituting it into one of the original equations. Two examples are worked through step-by-step to demonstrate solving simultaneous equations using this substitution method. The document concludes by recapping the key concepts and providing homework questions for additional practice.
This document provides instructions for factoring quadratic trinomials. It defines quadratic trinomials as expressions of the form ax^2 + bx + c, where a, b, and c are real numbers and a is not equal to 0. It then presents the steps to factor quadratic trinomials where a=1: 1) factor the first term, 2) factor the last term such that the sum of the factors equals the coefficient of the middle term, and 3) write the expression as a product of two binomials. Several examples demonstrating these steps are shown. Factors are checked using the FOIL method. Finally, factors are provided for three additional quadratic trinomials.
MIT Math Syllabus 10-3 Lesson 7: Quadratic equationsLawrence De Vera
This document discusses different methods for solving quadratic equations:
1) Factoring - Setting each factor of the factored quadratic equation equal to zero and solving.
2) Taking square roots - Taking the square root of both sides to isolate the variable.
3) Completing the square - Adding terms to complete the quadratic into a perfect square trinomial form.
4) Quadratic formula - A general formula for solving any quadratic equation using the coefficients.
The discriminant (b^2 - 4ac) determines the nature of the solutions, with positive discriminant yielding two real solutions and negative or zero discriminant yielding non-real or repeated solutions.
This document discusses solving simultaneous linear and quadratic equations. It explains that for a linear equation and a non-linear equation, an unknown can be expressed in terms of the other unknown from the linear equation. This forms a quadratic equation that can then be solved using factorisation or the quadratic formula to obtain the values for both unknowns. As an example, it shows choosing x as the easier unknown from the linear equation x+2y=4 to get x=4-2y, then substituting this into the quadratic equation x^2+xy+y^2=7. This results in a quadratic equation that can be factorised to solve for y and back substitute to find x.
This material is for PGPSE / CSE students of AFTERSCHOOOL. PGPSE / CSE are free online programme - open for all - free for all - to promote entrepreneurship and social entrepreneurship PGPSE is for those who want to transform the world. It is different from MBA, BBA, CFA, CA,CS,ICWA and other traditional programmes. It is based on self certification and based on self learning and guidance by mentors. It is for those who want to be entrepreneurs and social changers. Let us work together. Our basic idea is that KNOWLEDGE IS FREE & AND SHARE IT WITH THE WORLD
The document discusses rational expressions and provides examples of simplifying various rational expressions. It also provides download links for additional educational materials on topics like permutations, combinations, differentiation, integration, and more. The document is authored by Dr. T.K. Jain and is intended for participants in a social entrepreneurship program.
Tricks to remember the quadratic equation.ACTION RESEARCH ON MATHSangelbindusingh
This document provides information about different methods for solving quadratic equations. It discusses factoring the equation, using the quadratic formula, and completing the square. Step-by-step explanations are provided for each method. Factoring involves finding two binomials that multiply to give the quadratic term and add to the linear term. The quadratic formula is given as x = (-b ±√(b2 - 4ac))/2a. Completing the square requires grouping like terms and completing the square of the quadratic term.
This document discusses solving systems of equations by elimination. It provides examples of eliminating a variable by adding or subtracting equations. The key steps are: 1) write the equations in standard form; 2) add or subtract the equations to eliminate one variable; 3) substitute the eliminated variable back into one equation to solve for the other variable. Checking the solution in both original equations verifies the correct solution was found.
The document discusses solving quadratic equations using various techniques like factoring, completing the square, and the quadratic formula. It provides examples of using these methods to solve equations in standard form. The quadratic formula is derived and explained. The concept of the discriminant is introduced and how it relates to the number and type of solutions. An example problem is worked through applying the Pythagorean theorem and quadratic formula to solve a real world word problem.
The document discusses the quadratic formula and how to use the discriminant to determine the number of solutions a quadratic equation has. It provides examples of calculating the discriminant for different quadratic equations and relating the discriminant to whether there are 0, 1, or 2 solutions graphically.
The document provides examples of solving linear and nonlinear inequalities algebraically and graphing their solution sets. For linear inequalities, the solutions are intervals of real numbers defined by the solutions to the corresponding equalities. For nonlinear inequalities, the solutions are unions of intervals where the factors of the corresponding equalities have the same sign. The document also demonstrates solving compound inequalities and inequalities involving rational expressions.
1. The document contains 13 multiple choice questions regarding inequalities and absolute values.
2. The questions require evaluating logical statements and determining if they are sufficient to answer whether given inequalities are true.
3. Detailed step-by-step working is shown for each question, identifying the reasoning for selecting the answer. Common mistakes are discussed to help understand the concepts.
This document provides a summary of basic algebra concepts for entrepreneurs and social entrepreneurship participants. It includes example algebra problems with step-by-step solutions on topics like equations, factors, exponents, and scientific notation. It also provides links to download additional educational resources on algebra, statistics, reasoning, and other relevant subjects.
This document defines and explains how to solve quadratic equations. A quadratic equation is an equation that can be written in the standard form ax^2 + bx + c = 0, where a, b, and c are real numbers and a is not equal to 0. There are several methods for solving quadratic equations covered in the document: factoring, taking the square root, completing the square, and using the quadratic formula. The discriminant, b^2 - 4ac, determines the number and type of solutions.
AS LEVEL QUADRATIC (CIE) EXPLAINED WITH EXAMPLE AND DIAGRAMSRACSOelimu
This document discusses completing the square to write quadratic equations in standard form. It explains how to write quadratics in the form (x - h)2 + k when the leading coefficient a is positive, negative, or not equal to 1. The standard form allows easily finding the vertex (h, k) and sketching the graph. It also covers using the discriminant to determine the number of roots, solving quadratic inequalities, and relating the sign of a to whether the graph opens up or down.
The document discusses techniques for combining fractions with opposite denominators. It explains that we can multiply the numerator and denominator by -1 to change the denominator to its opposite. It provides examples of switching fractions to their opposite denominators and combining fractions with opposite denominators by first switching one denominator so they are the same. It also discusses an alternative approach of pulling out a "-" from the denominator and passing it to the numerator when switching denominators, ensuring the leading term is positive for polynomial denominators.
This document provides examples and explanations of operations involving polynomials and rational expressions. It covers factoring polynomials, evaluating polynomial expressions, adding, subtracting, multiplying and dividing rational expressions, and simplifying complex fractions and expressions with radicals. Step-by-step solutions are shown for problems such as factoring expressions, evaluating polynomials for given values, combining like rational expressions, rationalizing denominators, and more. The document demonstrates various techniques for working with polynomials and rational expressions.
1. The document discusses rules and principles for working with negative numbers and algebraic expressions involving negative numbers.
2. Key ideas include defining negative multiplication, such as -3 × 2, as -6; establishing that the order of factors does not matter in negative multiplication, similar to positive numbers; and simplifying algebraic expressions by using properties such as x - (y - z) = x - y + z.
3. General principles are stated for adding and subtracting negative numbers, and techniques are described for simplifying algebraic expressions involving negative terms.
The document provides instructions for graphing and solving various types of quadratic equations. It defines standard form, vertex form, and intercept form of quadratics. It explains how to graph quadratics by finding the vertex and intercepts. Methods covered include factoring, taking square roots, completing the square, and using the quadratic formula. Examples are included to demonstrate each process.
The document discusses different methods for solving equations, including:
- Solving 1st and 2nd degree polynomial equations by setting them equal to 0 and using factoring or the quadratic formula.
- Solving rational equations by clearing all denominators using the lowest common denominator.
- Solving equations may require transforming them into polynomial equations first through methods like factoring or factoring by grouping.
This document provides instruction on solving algebraic equations that have variables on both sides. It begins with a review of solving equations with a variable on one side, such as 6x+4=28. It then demonstrates how to solve equations with variables on both sides through a step-by-step process of combining like terms, moving terms to one side of the equation, and then dividing both sides by the coefficient of the variable. Several examples are worked through and solutions are checked by substituting the solutions back into the original equations. The document concludes by providing additional practice problems for the student to solve.
This document provides an overview and activities on solving quadratic equations by factoring. It begins by defining quadratic equations and their standard form. Several activities are presented to practice identifying quadratic equations, rewriting them in standard form, and factoring trinomials of the form x^2 + bx + c. The final activity involves factoring quadratic equations to determine their roots. The document aims to build mastery of skills needed to solve quadratic equations using factoring techniques.
This document discusses solving simultaneous linear equations using the substitution method. It begins by defining linear equations and simultaneous equations. The substitution method is explained as expressing one variable in terms of the other and substituting it into one of the original equations. Two examples are worked through step-by-step to demonstrate solving simultaneous equations using this substitution method. The document concludes by recapping the key concepts and providing homework questions for additional practice.
This document provides instructions for factoring quadratic trinomials. It defines quadratic trinomials as expressions of the form ax^2 + bx + c, where a, b, and c are real numbers and a is not equal to 0. It then presents the steps to factor quadratic trinomials where a=1: 1) factor the first term, 2) factor the last term such that the sum of the factors equals the coefficient of the middle term, and 3) write the expression as a product of two binomials. Several examples demonstrating these steps are shown. Factors are checked using the FOIL method. Finally, factors are provided for three additional quadratic trinomials.
MIT Math Syllabus 10-3 Lesson 7: Quadratic equationsLawrence De Vera
This document discusses different methods for solving quadratic equations:
1) Factoring - Setting each factor of the factored quadratic equation equal to zero and solving.
2) Taking square roots - Taking the square root of both sides to isolate the variable.
3) Completing the square - Adding terms to complete the quadratic into a perfect square trinomial form.
4) Quadratic formula - A general formula for solving any quadratic equation using the coefficients.
The discriminant (b^2 - 4ac) determines the nature of the solutions, with positive discriminant yielding two real solutions and negative or zero discriminant yielding non-real or repeated solutions.
This document discusses solving simultaneous linear and quadratic equations. It explains that for a linear equation and a non-linear equation, an unknown can be expressed in terms of the other unknown from the linear equation. This forms a quadratic equation that can then be solved using factorisation or the quadratic formula to obtain the values for both unknowns. As an example, it shows choosing x as the easier unknown from the linear equation x+2y=4 to get x=4-2y, then substituting this into the quadratic equation x^2+xy+y^2=7. This results in a quadratic equation that can be factorised to solve for y and back substitute to find x.
This material is for PGPSE / CSE students of AFTERSCHOOOL. PGPSE / CSE are free online programme - open for all - free for all - to promote entrepreneurship and social entrepreneurship PGPSE is for those who want to transform the world. It is different from MBA, BBA, CFA, CA,CS,ICWA and other traditional programmes. It is based on self certification and based on self learning and guidance by mentors. It is for those who want to be entrepreneurs and social changers. Let us work together. Our basic idea is that KNOWLEDGE IS FREE & AND SHARE IT WITH THE WORLD
The document discusses rational expressions and provides examples of simplifying various rational expressions. It also provides download links for additional educational materials on topics like permutations, combinations, differentiation, integration, and more. The document is authored by Dr. T.K. Jain and is intended for participants in a social entrepreneurship program.
Tricks to remember the quadratic equation.ACTION RESEARCH ON MATHSangelbindusingh
This document provides information about different methods for solving quadratic equations. It discusses factoring the equation, using the quadratic formula, and completing the square. Step-by-step explanations are provided for each method. Factoring involves finding two binomials that multiply to give the quadratic term and add to the linear term. The quadratic formula is given as x = (-b ±√(b2 - 4ac))/2a. Completing the square requires grouping like terms and completing the square of the quadratic term.
This document provides an overview of quadratic equations and inequalities. It defines quadratic equations as equations of the form ax2 + bx + c = 0, where a, b, and c are real number constants and a ≠ 0. Examples of quadratic equations are provided. Methods for solving quadratic equations are discussed, including factoring, completing the square, and the quadratic formula. Properties of inequalities are outlined. The chapter also covers solving polynomial and rational inequalities, as well as equations and inequalities involving absolute value. Practice problems are included at the end.
This document provides practice questions and tips in business mathematics. It contains multiple choice questions related to topics like ratios, percentages, profit and loss, time and work, averages, simple and compound interest, discounts, and permutations and combinations. The questions are intended to help students prepare for competitive exams in subjects like commerce and management.
This document provides practice questions and tips in business mathematics. It contains multiple choice questions related to topics like ratios, percentages, profit and loss, time and work, averages, simple and compound interest, discounts, and permutations and combinations. The questions are intended to help students prepare for competitive exams in subjects like commerce and management.
This document discusses quadratic equations. It defines a quadratic equation as having degree 2 in the standard form ax2 + bx + c = 0. It provides examples of quadratic equations and explains that the roots are the values that satisfy the equation. Methods for solving quadratic equations are outlined, including factorization, completing the square, and the quadratic formula. The quadratic formula is defined as x = (-b ± √(b2 - 4ac))/2a. Discriminant is also discussed, which is denoted by D and equals b2 - 4ac, and how it relates to the number of real roots.
The document provides practice questions and tips for business mathematics exams. It includes 20 sample questions covering topics like ratios, percentages, time/work problems, profit/loss, and series sums. The questions are multiple choice with explanations provided for the answers.
This document provides solutions to exercises from NCERT Class 9 Maths Chapter 4 on linear equations in two variables. It includes:
1) Solving linear equations representing word problems and expressing equations in the form ax + by + c = 0.
2) Finding solutions that satisfy given linear equations and determining the value of k if a given point is a solution.
3) Drawing graphs of various linear equations by plotting points that satisfy each equation.
4) Giving two equations of lines passing through a point and noting there are infinitely many such lines.
This document discusses quadratic equations. It begins by defining a quadratic equation as an equation with one variable where the highest power of that variable is 2. Some examples of quadratic equations are provided. It then discusses different methods for solving quadratic equations, including factorizing, using the quadratic formula, and word problems involving quadratic equations. Key steps in the methods are outlined such as expressing the equation in standard form and setting each factor equal to 0 when factorizing. Practice problems are provided to illustrate the different solving techniques.
This material is a part of PGPSE / CSE study material for the students of PGPSE / CSE students. PGPSE is a free online programme for all those who want to be social entrepreneurs / entrepreneurs
This document provides a summary of basic algebra concepts for entrepreneurs and social entrepreneurship participants. It includes example algebra problems with step-by-step solutions on topics like equations, factors, exponents, and scientific notation. It also provides links to download additional educational resources on algebra, statistics, reasoning, and other relevant subjects.
The document provides instructions and examples for calculating basic statistics including geometric mean, harmonic mean, regression equations, and coefficients of correlation. It explains how to find the geometric mean by multiplying numbers together and finding common factors. It describes how to calculate the harmonic mean by taking the reciprocal of numbers and finding their average. It gives steps for finding regression equations including calculating covariance, variance, and using these values to determine coefficients. Examples are provided to illustrate these statistical calculations.
The document discusses solving quadratic equations by factoring. It provides examples of factoring quadratic expressions to find the solutions to the equations. These include using the zero product rule, factoring a common factor, and factoring a perfect square. It also provides two word problems involving consecutive integers and the Pythagorean theorem and shows how to set up and solve the quadratic equations derived from the word problems.
Mayank and Srishti presentation on gyandeep public schoolMayankYadav777500
This document discusses quadratic equations. It begins by thanking teachers for allowing students to do a project on quadratic equations. It then provides a brief history of quadratic equations and defines them as polynomial equations of degree 2 in the form of ax2 + bx + c = 0. It discusses roots, different forms quadratic equations can take, methods for solving them including factoring and the quadratic formula, and the concept of the discriminant. Examples are provided to illustrate solving by factoring and using the quadratic formula. In the end it provides sources used in the document.
Similar to Linear and quadratic equations in quantitative aptitude (20)
Examination reforms are essential to transform the education system according to the document. The current examination system focuses only on rote memorization but needs to evaluate creativity and problem-solving. The document outlines steps to reform examinations including setting goals based on program and course objectives, evaluating whether objectives are achieved through direct and indirect methods, using continuous evaluations, and adopting open book exams and multiple evaluation methods.
Linear and quadratic equations in quantitative aptitude
1. LINEAR AND QUADRATIC EQUATIONS IN QUANTITATIVE APTITUDE by : DR. T.K. JAIN AFTERSCHO ☺ OL centre for social entrepreneurship sivakamu veterinary hospital road bikaner 334001 rajasthan, india FOR – PGPSE / CSE PARTICIPANTS mobile : 91+9414430763
2. My words.... Here I present a few basic questions on linear and quadratic equations. I wish that more people should become entrepreneurs. An ordinary Indian entrepreneur wishes to remain an honest entrepreneur and contribute to the development of nation but we have to strengthen those institutions which truly promote entrepreneurship, not just degree granting institutions. Let us work together to promote knowledge, wisdom, social development and education. We believe in free education for all, free support for all, entrepreneurship opportunities and training for all. Let us work together for these goals. ... I alone cant do much, I need support of perosns like you .......... ...
3. What is an equation? Equal = the two sides must be equal, so equation generally puts a mathematical structure equal to 0 or equal to Y or some other variable The beginning letters of the alphabet a, b, c, etc. are typically used to denote constants, while the letters x, y, z , are typically used to denote variables. For example, if we write y = ax² + bx + c, we mean that a, b, c are constants (i.e. fixed numbers), and that x and y are variables.
4. What is quadratic equation? Generally, when the highest power of x is 2 in an equation, it is called quadratic equation, and when the highest power of x is 1, it is linear equation. In a linear equation, we have relationship between two variables (x and Y). y = 2x + 6 This is called an equation of the first degree. It is called that because the highest exponent is 1. (exponent = power of x)
5. Which of the following ordered pairs solve this equation: y = 3x − 4 ? Options (0, −4) (1, 2) (1, −1) (2, −3) solution (0, −4) and (1, −1). Because when x and y have those values, the equation is truegive you solution as when you put the value of x =0 you get y =-4 and when you put value of x =1, you get y=2.
6. Which of these ordered pairs solves the equation y = 5x − 6 ? (1, −2) (1, −1) (2, 3) (2, 4) solution : (1,-1) and (2,4) give you solution as when you put the value of x =1 you get y =-1 and when you put value of x =2, you get y=4.
7. Form an equation, where roots are 7 and -3? Format of equation is : x^2 – (sum of roots) x+ (product of roots) = 0 sum of roots = 4 product of roots = -21 thus answer = =x^2 -4x-21 = 0
8. Form an equation, where roots are 3 and -2? Format of equation is : x^2 – (sum of roots) x+ (product of roots) = 0 sum of roots = 1 product of roots = -6 thus answer = =x^2 -x-6 = 0
9. Form an equation, where roots are -12 and -7? Format of equation is : x^2 – (sum of roots) x+ (product of roots) = 0 sum of roots = -19 product of roots = 84 thus answer = =x^2 +19x +84= 0
10. Form an equation, where roots are 2 and 27? Format of equation is : x^2 – (sum of roots) x+ (product of roots) = 0 sum of roots = 29 product of roots = 54 thus answer = =x^2 -29x +54= 0
11. Which of these is a root of this equation : x^4 – 10x^2 +9 =0? Options : 21, 0, -4 ,- 3 try with options, when we put the value of X as -3, we get the answer, so answer = -3
12. Which of these is a root of this equation : 8x^2-22x-21=0? Options : 3/4, 5/2, 7/2, 9/2 try with options, when we put the value of X as 7/2 , we get the answer, so answer = 7/2
13. What is the discriminant of this equation : x^4 – 10x^2 +9 =0? Discriminant =b^2 – 4ac in this equation a = 1, b=-10 and c = 9 =100 – 4(1*9) =64 answer
14. What are the roots of 2x^2 -5x -4 =0 There are two roots in quadratic equations alpha and beta alpha = (-b-sqrt(discriminant)) / 2a beta = (-b+sqrt(discriminant)) / 2a discriminant = 25 – 4(-8) = 57 alpha = (5- (sqrt(57)) / (2*2) =3.11 BETA = 6.89 ANSWER
15. What are the roots of x^2 -8x -21 =0 There are two roots in quadratic equations alpha and beta alpha = (-b-sqrt(discriminant)) / 2a beta = (-b+sqrt(discriminant)) / 2a discriminant = 64 – 4(-21) =148 alpha = (8- (sqrt(148)) / (2) alpha = 2 and beta = 14 (approximate)
16. What are the roots of x^2 -8x+21 =0 There are two roots in quadratic equations alpha and beta alpha = (-b-sqrt(discriminant)) / 2a beta = (-b+sqrt(discriminant)) / 2a discriminant = 64 – 4(21) =-20 here both the roots are imaginary because the discriminant is negative. (-20) answer
17. How many different roots are possible in this equation: x^2 -8x+16 =0 There are two roots in quadratic equations alpha and beta alpha = (-b-sqrt(discriminant)) / 2a beta = (-b+sqrt(discriminant)) / 2a discriminant = 64 – 4(16) =0 here we have only one root because discriminant is zero, so both the roots are same numbers.
18. How many solutions are possible from the following equations : 3x-2y=1 and 6x-4y=2 We know that : a1/a2 = b1/b2 = c1/c2, then there are infinite number of solution, in these two equations, we have =3/6 = 2/4 = 1/2, so we have infinite number of solutions
19. How many solutions are possible from the following equations : 3x-2y=1 and 6x-4y=9 We know that : a1/a2 = b1/b2 >< c1/c2, (c1/c2 is not equal to the first two ) then there is no solution , in these two equations, we have =3/6 = 2/4 not equal to 1/9 so we dont have any solution
20. How many solutions are possible from the following equations : 3x-2y=1 and 6x-3y=9 We know that : a1/a2 is not equal to b1/b2 then there is only one solution let us multiply the first equation by 2 and find the difference : y = 7 and X = 5
21. Kx^2 +2x +3k = 0 clues : 1. sum of roots is equal to product of roots. Can you guess k ? Sum of roots = -b/a product of roots = c / a here sum of root is = -2/k and product of root is 3k/k -2/k = 3k/k =-2/k = 3 k = -2/3 answer
22. There are two numbers. Their product is 782 and their sum is 57, can you guess the numbers ? Options : 43 & 14, 44 & 13 , 34 & 23 24&33 answer : 34 & 23
23. 3x^2 +11x+k=0 the roots are reciprocal to each other. Can you guess what is k ? Product of two reciprocals is always 1. We know that product of roots = c/a, which is k/3 roots are reciprocal so c/a = 1 k/3 =1, so k =3 answer
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