Question

Упростите выражение:
(x-12)(x+12)
(3a+2b)2b-3a)
(n-4n в кубе)(n+4n в кубе)

Answer 1

$1) \:(x - 12) \times (x + 12) = \\ = {x}^{2} - {12}^{2} = {x}^{2} - 144.$
$2) \:(3a + 2b)(2b - 3a) = \\ = (2b + 3a)(2b - 3a) = \\ = {(2b)}^{2} - (3a {)}^{2} = \\ = 4 {b}^{2} - 9 {a}^{2} .$
$3) \: (n - 4 {n}^{3} )(n + 4 {n}^{3} ) = \\ = {n}^{2} - (4 {n}^{3} {)}^{2} = \\ = {n}^{2} -16 {n}^{5}.$