SOLUTION: what is (x-1)^2-9=0....in factoring,extracting the square root,completing the square,quadratic formula,graphing

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Question 631633: what is (x-1)^2-9=0....in factoring,extracting the square root,completing the square,quadratic formula,graphing

Answer by Maths68(1474) About Me  (Show Source):
You can put this solution on YOUR website!
%28x-1%29%5E2-9=0
%28x-1%29%5E2=9
sqrt%28%28x-1%29%5E2%29=sqrt%289%29
sqrt%28%28x-1%29%28x-1%29%29=sqrt%28%283%29%283%29%29
x-1=3
x=3%2B1
x=4

Check
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%28x-1%29%5E2-9=0
Put x=4
%284-1%29%5E2-9=0
%283%29%5E2-9=0
9-9=0
0=0