Algebra
posted by Mur on .
Solve. (x+5)(x3)(x+4) is greater than 0.
Use at least one inequality or compound inequality to express your answer. Type R if the answer is in all real numbers.

The expression is zero at x= 5, 4 and +3. It becomes increasingly negative for x<5 and increasing positive for x>3.
It is negative for 4<x<3 and positive for 5<x<4
Therefore the answer is x>3 and 5<x<4
Try graphing it and see. It is negative at x=0 and positive for x=4.5,so that works.