SOLUTION: x^3-81x=0

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Question 97977: x^3-81x=0
Answer by tutorcecilia(2152) About Me  (Show Source):
You can put this solution on YOUR website!
Factoring:
%28x%5E3-81x%29=0
%28%28x%29%28x%5E2-81%29%29=0
(x)(x+9)(x-9)=0
.
To find the x-intercepts, set each factor equal to zero and solve for the x-term:
x=0
.
x-9=0
x=9
.
x+9=0
x=-9