SOLUTION: Solve. What is the solution set? (x+6)(x-4)(x+4)>0

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Question 312422: Solve. What is the solution set?
(x+6)(x-4)(x+4)>0

Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!
Break up the number line into 4 regions,
Region : (,)
Region : (,)
Region : (,)
Region : (,)
Pick a point in each region (not the endpoints) and test the inequality.
If the inequality is true, that region is part of the solution set.
.
.
Region , let




False
.
.
Region , let




True
.
.
Region , let




False
.
.
Region , let




True
So then the solution includes Regions 2 and 4.
(,)U(,)

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