Question

Решите уравнение
(3х-1)(9х^2+3х+1)=3х(3х-1)(3х+1)-82

Answer 1

Ответ:

Вот

Объяснение:

Answer 2

$\underbrace{(3x-1)(9x^{2}+3x+1)}_{27x^{3}-1} =3x\underbrace{(3x-1)(3x+1)}_{9x^{2}-1} -82\\\\27x^{3}-1-3x(9x^{2}-1)+82=0\\\\27x^{3} -1-27x^{3}+3x+82=0\\\\3x+81=0\\\\3x=-81\\\\\boxed{x=-27}$