Question

(x−1)(x2+x+1)+(2−x)(4+2x+x2)=x

Answer 1

(x-1)(x2+x+1)+(2-x)(4+2x+x2)=x
(x-1)(2x+x+1)+(2-x)(4+2x+2x)
(x-1x3x+1)+(2-x)(4+4x)
3x^2+x-3x-1+8+8x-4x-4x^2
-x^2+2x+7

Answer 2

Линейная функция : y=2-x