Answer
$\frac{9}{2}$$a^{4}$$b^{6}$
Work Step by Step
(-$\frac{9}{5}$$a^{3}$$b^{4}$)(-$\frac{15}{6}$a$b^{2}$) =
Use the exponent rule to simplify: $b^{n}$ $b^{m}$ = $b^{m+n}$
(-$\frac{9}{5}$) $\times$ (-$\frac{15}{6}$) $\times$ $a^{3+1}$ $\times$ $b^{4+2}$ =
$\frac{9}{2}$ $\times $ $a^{4}$ $\times$ $b^{6}$ =
$\frac{9}{2}$$a^{4}$$b^{6}$
