Question

Ex. de fatoração.
$9 { x}^{2} - 9x - 12xy + 12y - 6 {xy}^{2} + 8 {y}^{3}$

Answer 1

$9x^{2}-9x-12xy+12y-6xy^{2}+8y^{3}\\ 9x(x-1) -12y(x-1) - 2y^{2}(3x-4y)\\ (x-1)(9x-12y) - 2y^{2}(3x-4y)\\ 3(x-1)(3x-4y)- 2y^{2}(3x-4y)\\ (3x-4y)(3(x-1)-2y^{2})\\ (3x-4y)(3x-3-2y^{2})$

Pronto!