Question

ПОМОГИТЕ СРОЧНО, ПОЖАЛУЙСТА упростить:(x^2-1)/(1-x^3)-(x^2)/(x^2+x+1)

Answer 1

(x-1)(x+1)/[(1-x)(1+x+x²)]-x²/(1+x+x²)=-(x+1)/(1+x+x²)-x²/(1+x+x²)=
=(-x-1-x²)/(1+x+x²)=-(1+x+x²)/(1+x+x²)=-1