Factor:
$-12x^2+27$
-3(2x+3)(2x+3)
(2x+3)(2x+3)
-3(2x+3)(2x-3)
$-3(4x^{2}-9)$
(2x+3)(2x-3)
Factor and simplify:
$\frac{64y^{2} - 16}{8y + 4}$
8y-4
8y-12
8y
8y+4
-4
