Answer
8.4$a^{4}$$b^{5}$
Work Step by Step
(-6$a^{2}$b)(-1.4$a^{2}$$b^{4}$) =
Use the exponent rule to simplify: $b^{n}$ $b^{m}$ = $b^{m+n}$
(-6) $\times$ (-1.4) $\times$ $a^{2+2}$ $\times$ $b^{1+4}$ =
8.4 $\times$ $a^{4}$ $\times$ $b^{5}$ =
8.4$a^{4}$$b^{5}$
