SOLUTION: How do you simplify:square root of square (x) + 9x+15 = X+5

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Question 964556: How do you simplify:square root of square (x) + 9x+15 = X+5
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
sqrt%28x%5E2%2B9x%2B15%29=x%2B5 Square each side.
x%5E2%2B9x%2B15=x%5E2%2B10x%2B25
9x%2B15=10x%2B25
15=x%2B25
-10=x
ANSWER: x=-10
CHECK:
sqrt%28x%5E2%2B9x%2B15%29=x%2B5
sqrt%28-10%5E2%2B9%28-10%29%2B15%29=%28-10%29%2B5
sqrt%28100-90%2B15%29=-5
sqrt%2825%29=-5
-5=-5