1. 3-3 Solving Inequalities Using Multiplication or Division
How do you handle negative numbers in inequalities when multiplying or dividing?
Multiplying or dividing both sides of an inequality by a negative number affects the inequality symbol. It changes the meaning of the inequality.
You need to reverse the inequality symbol to make the inequality true.

2. 3-3 Solving Inequalities Using Multiplication or Division
What is the Multiplication Property of Inequality?
Let a, b, and c be real numbers with c > 0
If a > b, then ac > bc
If a < b, then ac < bc
Let a, b, and c be real numbers with c < 0
If a > b, then ac < bc
If a < b, then ac > bc
This property is also true for  and ≤.

3. 3-3 Solving Inequalities Using Multiplication or Division
What is the Division Property of Inequality?
Let a, b, and c be real numbers with c > 0
If a > b, then a  c > b  c
If a < b, then a  c < b  c
Let a, b, and c be real numbers with c < 0
If a > b, then a  c < b  c
If a < b, then a  c > b  c
This property is also true for  and ≤.