SOLUTION: What is the answer to this extraneous problem: x-3= square root x+9

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Question 971302: What is the answer to this extraneous problem: x-3= square root x+9
Found 2 solutions by rothauserc, MathTherapy:
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
x-3 = square root(x+9)
square both sides of =
x^2 -6x + 9 = x+9
x^2 -7x = 0
x*(x-7) = 0
x = 0 or 7

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!

What is the answer to this extraneous problem: x-3= square root x+9
Correct solution:    highlight_green%287%29

Extraneous solution: highlight_green%280%29