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Ch 6.2 One Step Inequalities (Multiplication). Objective: To solve and graph simple inequalities involving multiplication and division. . Definitions. Multiplication Property of Inequality: When multiplying by a negative number, the inequality symbol reverses.

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## Ch 6.2 One Step Inequalities (Multiplication)

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**Ch 6.2One Step Inequalities (Multiplication)**Objective: To solve and graph simple inequalities involving multiplication and division.**Definitions**• Multiplication Property of Inequality: When multiplying by a negative number, the inequality symbol reverses. In other words, “FLIP” the inequality sign • Division Property of Inequality: When dividing by a negative number, the inequality symbol reverses. In other words, “FLIP” the inequality sign**Rules**Inequalities transform like equations except... When multiplying or dividing by a negative number you must reverse (flip) the inequality. -4 -3 -2 -1 0 1 2 3 4 Negative side Positive side -3 < -2 3 > 2 (-1)(-1) 3 > 2 Large is small Large is large flip -3 -2 <**Why?**Example using Multiplication/Division: -x < 1 -1 -1 x > -1 (The inequality “flipped”) Same example using Addition/Subtraction: - x < 1 + x + x 0 < 1 + x - 1 < -1 -1 < x = x > -1**Example 1**Example 2 (3) (3) x -6 x 5 ≤ > -6 0 0 5 Example 4 Example 3 (-3) (-3) y -21 ≤ x -6 > -21 0 -6 0**Example 6**Example 5 (-2) (-2) x -6 < m -12 > -12 0 -6 0 Example 8 Example 7 (8) (8) -13 n n > -13 < x -2 ≥ -13 0 -2 0**Classwork**Graph the following inequalities. 1) 2) 0 0 3) 4) 0 0**5)**6) 0 0 7) 8) -2k < 8 0 0

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