Question

Решите линейное уравнение 8 класс: x(x^-2)=x^+8

Answer 1

x (x^2 - 2) = x^3 + 8
x^3 - 2x = x^3 + 8
x^3 - 2x - x^3 - 8 = 0
- 2x - 8 = 0
- 2x = 8
2x = - 8
x = - 4