Simplifying Polynomials Review
Simplify the following expressions. Be sure to write your simplified expression in descending order
3x(8x+9)\displaystyle -{3}{x}{\left({8}{x}+{9}\right)}
 
(4x2)(x+4)\displaystyle {\left(-{4}{x}-{2}\right)}{\left({x}+{4}\right)}
 
(8x+9)(8x9)\displaystyle {\left({8}{x}+{9}\right)}{\left({8}{x}-{9}\right)}
 
(4x2)(3x2+7x+5)\displaystyle {\left(-{4}{x}-{2}\right)}{\left({3}{x}^{{2}}+{7}{x}+{5}\right)}