SOLUTION: Xsquare-81=0

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Question 706066: Xsquare-81=0
Answer by lenny460(1073) About Me  (Show Source):
You can put this solution on YOUR website!
Xsquare-81=0

x^2 - 81 = 0

We solve the above using the difference
of squares method.

x^2 - 81 = 0
= (x + 9)(x - 9) = 0
Therefore:
x = 9 or
x = -9


Lennox Obuong
Algebra Tutor