(x+1)(x-1)(x-2)-(x^2+7x)(x-4)-2=2x

Question

(x+1)(x-1)(x-2)-(x^2+7x)(x-4)-2=2x

Answer 1

(х^2-1)(x-2) - (x^3+7x^2-4x^2-28x) - 2 =2x

x^3-x-2x^2+2-x^3-3x^2+28x-2=2x

27x-5x^2=2x

25x=5x^2

25=5x

x=5

Answer 2

x^2-2+x^2-3-x^2+7x*x-4-2=2x