SOLUTION: Solve for x: √(x+7)=x-5
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Question 417115: Solve for x: √(x+7)=x-5
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Solve for x: √(x+7)=x-5
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Square both sides:
x+7 = x^2-10x+25
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x^2-11x+18 = 0
x^2-9x-2x+18 = 0
x(x-9)-2(x-9) =0
(x-9)(x-2) = 0
x = 2 or x = 9
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Check those "answers":
Only x = 9 is acceptable.
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Cheers,
Stan H.
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