Question

(х-1)³-(х-2)³=7 как решить?

Answer 1

Ответ:

2х+7=3х-2(3х-1)

2х-3х+6х=2-7

5х=-5

х=-1

Пошаговое объяснение:

Answer 2

$x {}^{3} - 3x {}^{2} + 3x - 1 - (x {}^{3} - 6x {}^{2} + 12x - 8) = 7 div x {}^{3} - 3x {}^{2} + 3x - 1 - x {}^{3} + 6x {}^{2} - 12x + 8 = 7 \ 3x {}^{2} - 9x + 7 = 0 \ 3x {}^{2} - 9x = 0 \ 3x(x - 3) = 0 \ x(x - 3) = 0 \ x = 0 \ x = 3$