Factor Completely $3 x^{2}-4 x-15$ (B) $x^{3}-64$ (C) $x^{2}+w x-20 w^{2}$ (D) $x^{3} y^{2}+4 x^{3}+8 y^{2}+32$

Essay

Factor completely.
(a) $3 x^{2}-4 x-15$
(b) $x^{3}-64$
(c) $x^{2}+w x-20 w^{2}$
(d) $x^{3} y^{2}+4 x^{3}+8 y^{2}+32$