Question

0=(x-1)^2-4


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Answer 1

x=-1,3

Explanation:

0=(x-1)^2-4

Add 4 to each side

0+4=(x-1)^2-4+4

4 = (x-1)^2

Take the square root of each side

sqrt(4) = sqrt((x-1)^2)

±2 = x-1

Separate into 2 equations

2 = x-1 -2 = x-1

Add 1 to each side

2+1 = x-1+1 -2 +1 =x-1+1

3 =x -1 =x

There are two solutions

x=-1,3