SOLUTION: how would i solve x^2-9=0?

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Question 422607: how would i solve x^2-9=0?
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

x%5E2-9=0
x%5E2-3%5E2=0...factor as the difference of the squares
%28x-3%29%28x%2B3%29=0
if x-3=0.....->...x=3
if x%2B3=0.....->...x=-3
so, your solutions are: x1=3 and x2=-3