Question 323191: Solve.
(x+15)(x-10)(x+5)> 0
Is there no solution?
Is it all real numbers?
Use at least one inequality or compound inequality
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Solve.
(x+15)(x-10)(x+5)> 0
Is there no solution?
Is it all real numbers?
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Draw and number line and plot x=-15, x= -5 , x = 10
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That divides the number line into 4 segment.
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Test a value from each segment to see where the solutions lie.
Substitute into : (x+15)(x-10)(x+5)> 0
If x = -20 you get -*-*- > 0 ; false so no solutions in (-inf,-10)
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If x = -10 you get +*-*- > 0 ; true so solutions in (-15,-5)
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If x = 0 you get: +*-*+ > 0 ; false so no solutions in (-5,10)
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If x = 20 you get: +*+*+ > 0 ; true so solutions in (10,+inf)
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Cheers,
Stan H.
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