SOLUTION: Solve (x+15)(x-19)(x+13)>0

Question 323502: Solve (x+15)(x-19)(x+13)>0
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Break up the number line into 4 regions.
Region 1:(,)
Region 2:(,)
Region 3:(,)
Region 4:(,)
Choose an x value in each region (not an endpoint) and test the inequality.
If the x value solves the inequality, that region is part of the solution.
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.
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Region 1: Let

False, this region is not part of the solution.
.
.
.
Region 2: Let

True, this region is part of the solution.
.
.
.
Region 3: Let

False, this region is not part of the solution.
.
.
.
Region 4: Let

True, this region is part of the solution.
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Solution Region : (,) U (,)
(NOTE: Scale of y axis: 1 division=250 units)

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