Question

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

Answer 1

x^2+12x-12x-144=x^2-144

6ab-9a^2+4b^2-6ab=-9a^2+4b^2

n^2+4n^4-4n^4-16n^6=n^2-16n^6

Answer 2

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