Question

reduce : (x + 2)^3 - 2(4x^2 + 6x) + 2x^2

Answer 1

Respuesta:

$\left(x\:+\:2\right)^3\:-\:2\left(4x^2\:+\:6x\right)\:+\:2x^2$

$\left(x+2\right)^3=x^3+6x^2+12x+8$

$x^3+6x^2+12x+8-2\left(4x^2+6x\right)+2x^2$

$x^3+6x^2+12x+8-8x^2-12x+2x^2$

$x^3+8$

Saludos...