# algebra

posted by
**ann** on
.

please check and correct thanks

Problem: solve and check the inequality if possible

|4F+8|< 12

positive: negative:

|4F+8| < 12 |4F + 8| < -12

4F + 8 -8 < 12 - 8 4F +8-8 < -12-8

4F < 4 4F< -20

F < 1 F< -5

solutions 1 and -5 or

-5 < F < 1

check positive ck negative

|4F + 8| < 12 |4F + 8| < -12

4(1) + 8 < 12

4 + 8 < 12 4(-5) + 8 < -12

12 < 12 -20 +8 < -12

-12 < -12