Question

решите уравнение: (х+1)(1-х+х^2)-x(x+2)(x-2)=x+7

Answer 1

(x + 1)(x^2 - x + 1) - x(x^2 - 4) = x + 7
x^3 + 1 - x^3 + 4x = x + 7
4x - x = 7 - 1
3x = 6
x = 6/3
x= 2