Factorise the expression $9x^2+12x+4$9x2+12x+4.
Factorise the expression $64x^2-48x+9$64x2−48x+9.
Factorise the expression by first taking out a common factor:
$5x^2+30x+40$5x2+30x+40
Factorise the expression by first taking out a common factor:
$4x^2-4x-288$4x2−4x−288