Question

Решите уравнение
x(x²+2x+1)+x(x²+1)=

Answer 1

$x(x^2+2x+1)+x(x^2+1)=x(x^2+2x+1+x^2+1)= \\ =x(2x^2+2x+2)=2x^3+2x^2+2x$