SOLUTION: Will you please help me solve the following problem: square root x-1=x-7 answer choices: a. 5 b. 10 c. (1, 2) These are the squiggly parenthesis

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Question 91615: Will you please help me solve the following problem:
square root x-1=x-7
answer choices:
a. 5
b. 10
c. (1, 2) These are the squiggly parenthesis


Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Solve:
sqrt%28x-1%29+=+x-7 Square both sides.
x-1+=+x%5E2-14x%2B49 Subtract x from both sides.
-1+=+x%5E2-15x%2B49 Add 1 to both sides.
x%5E2-15x%2B50+=+0 Factor.
%28x-5%29%28x-10%29+=+0 Apply the zero products principle.
x-5+=+0 or x-10+=+0
x = 5 or x = 10