Question

descompuneti in factori: 9xla2(×-3)+12×(×-3)+4(×-3)​

Answer 1

$9 {x}^{2} (x - 3) + 12x(x - 3) + 4(x - 3)$

$= (x - 3)(9 {x}^{2} + 12x + 4)$

$=(x-3)[{(3x)}^{2}+2\times3x\times2+{2}^{2}]$

$= (x - 3) {(3x + 2)}^{2}$