Chapter 7

Factor each expression. $$ 25 x^{2}-40 x y+16 y^{2} $$

Expand each binomial. $$ \left(x^{2}+2 y^{3}\right)^{6} $$

Factor each expression. $$ 9 x^{2}+48 x+64 $$

Simplify each expression. $$ (2-3 \sqrt{-4})+(4+2 \sqrt{-16}) $$

Simplify each expression. $$ 3 \sqrt{-50}-(2-\sqrt{-32}) $$

Simplify each expression. $$ (6+\sqrt{-20})-(-7-\sqrt{-45}) $$

Simplify each expression. $$ (5-\sqrt{-9})(2-\sqrt{-36}) $$