x^2-2x-120=0 .
Solve by Completing square method.
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x²-2x-120=0
x²-(2)(x)(1)+(1)²-(1)²-120=0
it can be written as
(x-1)²-1-120=0
(x-1)²=121
x-1=√121
x-1=+or- 11
x-1=11. x-1=-11
x=12. x=-10
x²-(2)(x)(1)+(1)²-(1)²-120=0
it can be written as
(x-1)²-1-120=0
(x-1)²=121
x-1=√121
x-1=+or- 11
x-1=11. x-1=-11
x=12. x=-10
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