Question

root x = x-2 then x =?

Answer 1

4

$\sqrt{x } = x - 2 \\ \\ \sqrt{4} = 4 - 2$

Answer 2

Rt. x=x-2

then x=(x-2)^2

x=x^2-2(x)(2)+2^2

x=x^2-4x+4