Question

Упростить (x-3)(x²+3x+9)-(x+1)(x-1)(x-2)

Answer 1

Ответ:

$2x {}^{2} + x - 29$

Answer 2

Объяснение:

$(x - 3)( {x}^{2} + 3x + 9) - (x + 1)(x - 1)(x - 2) = \\ {x}^{3} - {3}^{3} - ( {x}^{2} - 1)(x - 2) = \\ {x}^{3} - 27 - ( {x}^{3} - 2 {x}^{2} - x + 2) = \\ {x}^{3} - 27 - {x}^{3} + 2 {x}^{2} + x - 2 = \\ 2 {x}^{2} + x - 29$