Question

(3x-1)(2x+3)-2x(x+1)+2(x+2)(x-3) :

Answer 1

6x^2+7x-3-2x^2-2x+2x^2-2x-12=
6x^2+3x-15=
3(2x^2+1-5)

Answer 2

$={6x}^{2}+9x-2x-3-{2x}^{2}-2x+2({x}^{2}-3x+2x-6)$
$={6x}^{2}+9x-2x-3-{2x}^{2}-2x+2{x}^{2}-6x+4x-12$
$={6x}^{2}+3x-15$