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March 31, 2014
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March 31, 2014

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  • 1. Today:  STAR Math Progress  Class Notes; ax2 + bx + c trinomials, Linear vs. Quadratic Equations  Test: Factoring Quadratic Expressions March 31
  • 2. Today's Test:  GCF, Grouping, x2 + bx + c trinomials, Perfect Square Trinomials/Special Products  Class Notes; Not on today's test, but next test  ax2 + bx + c trinomials, Linear vs. Quadratic Equations  Test: Factoring Quadratic Expressions
  • 3. Class Notes: 2. (4x2 + 44x + 121) Part I of our 3rd quarter final will be on new material, including ax2 + bx + c trinomials. Part II will cover all other 3rd quarter concepts. 1. 4x2 – 9y6 3. 21x2 – 41x + 10 The Possible factors of 21x2 are what? Since our signs are -, +, possible factors of 10 must both be negative, and are.... When a•c results in a large number, we can mix and match factors of a and c, until we find a pair that works. {x, 21x} or {3x, 7x} {-1, -10} or {-2, -5}. Try different combinations until one pair equals the original trinomial. The correct factorization is... (3x – 5)(7x – 2) Diff. of squares PST
  • 4. Class Notes: Once more, 35x2 + 2x - 24 Our signs will be... ( ) ( )+ - Possible factors of 35x2 are {x, 35x} or {5x, 7x} The factors of 24 could have either sign, so both must be tested. (1, -24) or (-1, 24) (2, -12) or (-2, 12), etc. Since the middle term is a small number, the factors must be close to each other. Remember this important point.
  • 5. Class Notes: Linear vs. Quadratic Equations 1. Write a Linear Equation, any linear equation 2. Write the Linear Equation in both standard and slope- intercept form. Fill in the blank: (In your notebook) 3. The highest degree of any linear equation is _______. The angle of the line depends on the _______, and every linear equation results in a ________ line. 1 slope straight 4. Write the equation of the given line
  • 6. Quadratic Equations: (Write this down) Class Notes: 1. Have a highest degree of 2. 2. Have a standard form of: ax2 + bx + c = 0 3. Have a graph which always results in a parabola. 4. Have solutions which show the x intercept(s) Last question for today: Solve: x2 + 3x - 4 = 0 (x ) (x ) = 0+ -4 1 x = (-4, 1)
  • 7. Take 5, then we'll begin the test  You will need:  Your correct code, pencil only, no phones., scratch paper  Prayers, lots of prayers  You can use a regular calculator, but one is not necessary for this test.