170k views
4 votes
!!!!!!!!!!!!!!!!!!!WHEN DO YOU FLIP SIGNS IN INEQUALITIES????????????

User Robjohncox
by
7.3k points

2 Answers

4 votes
Here is some rules that can help: if a >= b then
a - b >= 0 (subtracting b from both sides)
and -b >= -a (subtracting a from both sides) so that
-a <= -b (rewriting the inequality in reverse)
This shows that when you multiply an inequality by -1 (which is part of what you do when you divide by a negative number), you reverse the inequality.
User Ephtron
by
7.9k points
1 vote
whenever u multiply or divide an inequality by a negative number u must flip the inequality sign
User Keiana
by
8.0k points