Question

(x + 3)(x2 - 3x + 9) - (x - 3)(x2 + 3x +9)

Ayudenme x favor​

Answer 1

Explicación paso a paso:

$x ^{3} - 27 - x ^{3} + 27$

Answer 2

$(x + 3)(x2 - 3x + 9) - (x - 3)(x2 + 3x +9)$

$=\left(x+3\right)\left(-x+9\right)-\left(x-3\right)\left(2x+3x+9\right)$

$=\left(x+3\right)\left(-x+9\right)-\left(x-3\right)\left(5x+9\right)$

$=-x^2+6x+27-\left(x-3\right)\left(5x+9\right)$

$=-x^2+6x+27-5x^2+6x+27$

$=-6x^2+12x+54$

ojala te sirva :3

Saludos