Question

(x³-7)+(2x²-x³)=x+2x²

Answer 1

Ответ:

(x³-x)+(2x²-2)=0

x(x²-1)+2(x²-1)=0

(x²-1)(x+2)=0

(x-1)(x+1)(x+2)=0

x=1 x=-1 x=-2