Question 135611
square root x-1=x-1
:
x - 1 = (x-1)^2; as you did
:
x - 1 = x^2 - 2x + 1; FOILed
:
0 = x^2 -2x - x + 1 + 1
:
A quadratic equation:
x^2 - 3x + 2 = 0
Factors to
(x-2)(x-1) = 0
:
x = 2, x = 1; either solution will work