Algebra 1
6.3    Solving Compound Inequalities

A compound inequality is ____________ inequalities connected by ________ or ______.

EX1: Write an inequality that represents the set of numbers. Then graph the inequality.
a)   All real numbers that are greater than zero and less than or equal to 4.



b)     All real numbers that are less than -1 or greater than 2.



Solving Inequalities with And
Goal: Get x by itself between the two signs.
   • Undo the order of operations to x from the middle and on __________ sides.

EX2: Solve −2 £ 3x - 8 £ 10 . Write the answer in set notation and graph the solution.




Solving Inequalities with Or
Goal: Get x by itself on both parts of inequality.
   • Undo the order of operations to x for the _____________ inequality.
   • _______________ for the second inequality.

EX3: Solve 3x + 1 < 4 ορ 2 ξ − 5 > 7 . Write the answer in set notation and graph.




Reversing Both Inequality Signs
EX4: −2 < - 2 - x < 1




HW p. 349 (12 – 34 even)

A16-3 Compound Inequalities Notes

  • 1.
    Algebra 1 6.3 Solving Compound Inequalities A compound inequality is ____________ inequalities connected by ________ or ______. EX1: Write an inequality that represents the set of numbers. Then graph the inequality. a) All real numbers that are greater than zero and less than or equal to 4. b) All real numbers that are less than -1 or greater than 2. Solving Inequalities with And Goal: Get x by itself between the two signs. • Undo the order of operations to x from the middle and on __________ sides. EX2: Solve −2 £ 3x - 8 £ 10 . Write the answer in set notation and graph the solution. Solving Inequalities with Or Goal: Get x by itself on both parts of inequality. • Undo the order of operations to x for the _____________ inequality. • _______________ for the second inequality. EX3: Solve 3x + 1 < 4 ορ 2 ξ − 5 > 7 . Write the answer in set notation and graph. Reversing Both Inequality Signs EX4: −2 < - 2 - x < 1 HW p. 349 (12 – 34 even)