SOLUTION: solve (x+20)(x-9)(x+6)>0 A).The solution set is {x|___}? B).The solution to all real numbers C).There are no solutions

Question 338678: solve (x+20)(x-9)(x+6)>0
A).The solution set is {x|___}?
B).The solution to all real numbers
C).There are no solutions
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 a point in each region (not an endpoint).
Test the inequality.
If the inequality is satisfied, the region is part of the solution region.
.
.
.
Region 1:

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

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

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

Ture, this region is part of the solution.
.
.
.
Solution:(,) U (,)
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