Question

Упростите выражение (2-х)(2+х)(х-1)+х^2(х-1)

Answer 1

(4-x^2)(x-1)+x^2(x-1)=4x-4-x^3+x^2+x^3-x^2=-4x-4=-4(x+1)

Answer 2

(2-х)(2+х)(х-1)+х²(х-1) =(х-1)((2-х)(2+х)+х²))=(х-1)(4-х²+х²)=4(х-1)