Question

Помогиекееее срочнооор

Answer 1

$2x(x {}^{2} + 36x + 324) - x {}^{3} - 18x {}^{2} = 0 \ 2x { }^{3} + 72x {}^{2} + 648x - x {}^{3} - 18x {}^{2} = 0 \ x {}^{3} + 54x {}^{2} + 648x = 0 \ x(x {}^{2} + 54x + 648) = 0 \ x(x {}^{2} + 36x + 18x + 648) = 0 \ x(x(x + 36) + 18(x + 36)) = 0 \ x(x + 36)(x + 18) = 0 \ x = 0 \ x + 36 = 0 \ x + 18 = 0 \ x = 0 \ x = - 36 \ x = - 18$