Question

1 -x square factors are

Answer 1

1+x and 1-x are the factors of the given expression

Answer 2

Factors of
(x-1)²=x²+1-2x
=x²-2x+1
=x²-x-x+1
=x(x-1)-1(x-1)
=(x-1)(x-1)

Factors of
1-x²
=1²-x²
=(1-x)(1+x)