Question

x-1=0$x^{2} + x^{2}$

Answer 1

x-1 = 0
x=1
$x^{2} + x^{2} = 2 x^{2}$

= $2*(1)^2$
=2*1 = 2

The answer is 2.

Answer 2

x=1
x^2+x^2=2x^2
2x^2=2