Question

Упростите выражение (x-3)(x^2+3x+9) -(x+1)(x-1)(x+2)​

Answer 1

$(x-3)(x^2+3x+9) -(x+1)(x-1)(x+2)$

$x {}^{3} - 27 - (x {}^{2} - 1) \times (x + 2)$

$x {}^{3} - 27 - x {}^{3} - 2x {}^{2} + x + 2$

$- 25 - 2x {}^{2} + x$

$- 2x {}^{2} + x - 25$

Answer 2

x^3-27-(x^2-1)(x+2)
x^3-27-(x^3+2x^2-x-2)
x^3-27-x^3-2x^2+x+2
-25-2x^2+x
-2x^2+x-25