Question

Find the product:

10a²(0.1a − 0.5b)

Answer 1

$$\begin{gathered} =10a^2\times 0.1a-10a^2\times 0.5b \\ =10\times 0.1\times a^2\times a-10\times 0.5\times a^2\times b \\ =1\times a^{(2+1)}-5a^{2}b \\ =a^3-5a^{2}b \end{gathered}$$