Question

Find the product:

8a²(2a + 5b)

Answer 1

$$\begin{gathered} =8{\mathrm{a}}^2\times 2\mathrm{a}+8{\mathrm{a}}^2\times 5\mathrm{b} \\ =8\times 2\times {\mathrm{a}}^2\times \mathrm{a}+8\times 5\times {\mathrm{a}}^2\times \mathrm{b} \\ =16{\mathrm{a}}^{(2+1)}+40{\mathrm{a}}^2\mathrm{b} \\ =16{\mathrm{a}}^3+40{\mathrm{a}}^2\mathrm{b} \end{gathered}$$