Question

решите уравнение: (x+2)(x^2-2x+4)-x(x-3)(x+3)=26

Answer 1

(x+2)(x²-2x+4)-x(x-3)(x+3)=26
x³+2³-x(x²-3²)=26
x³+8-x³+9x=26
9x=26-8
9x=18
x=2

Answer 2

(x+2)(x^2-2x+4)-x(x-3)(x+3)=26
x^3 -2x^2 +4x +2x^2 -4x +8 -x(x^2 -9) = 26
x^3 +8 -x^3 +9x = 26
9x = 26-8
9x = 18
x = 18/9
x=2