SOLUTION: x+5=√(9x+81) find x

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Question 350138: x+5=√(9x+81) find x
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Square both sides,
%28x%2B5%29%5E2=9x%2B81
x%5E2%2B10x%2B25=9x%2B81
x%5E2%2Bx-56=0
%28x%2B8%29%28x-7%29=0
Two solutions:
x%2B8=0
highlight%28x=-8%29
.
.
.
x-7=0
highlight%28x=7%29