You need to replace `(x - 1)^2` for expansion `x^2 - 2x + 1` , such that:

`sqrt ((x - 1)^2) = x + 1`

Taking the square root to the left side, yields:

`+-(x - 1) = x + 1`

You need to solve for `x` the equation, considering the left side positive, such that:

`x - 1 = x + 1 => - 1 = 1` invalid

You need to solve for x the equation, considering the left side negative, such that:

`-x + 1 = x + 1`

You need to isolate the terms that contain `x` to the left side, such that:

`-x - x = -1 + 1 => -2x = 0 => x = 0`

You need to test the value `x = 0` in equation, such that:

`sqrt(0^2 - 2*0 + 1) = 0 + 1 => sqrt 1 = 1 => 1 = 1` valid

**Hence, evaluating the solution to the given equation, yields **`x = 0.`

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