Question
Multiply: $mn^4, m^3n$ and $5m^2n^3$
✓
Answer
$\begin{aligned} & \mathrm{mn}^4, \mathrm{~m}^3 \mathrm{n} \text { and } 5 \mathrm{~m}^2 \mathrm{n}^3 \\ & \Rightarrow 5 \mathrm{~m}^2 \mathrm{n}^3 \times \mathrm{mn}^4 \times \mathrm{m}^3 \mathrm{n} \\ & \Rightarrow 5 \mathrm{~m}^{2+1+3} \mathrm{n}^{3+4+1} \\ & =5 \mathrm{~m}^6 \mathrm{n}^8\end{aligned}$
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