Question

Divide −21abc² by 7abc.

Answer 1

$$\begin{gathered} \frac{-21ab{c}^2}{7abc} \\ =\frac{-21\times a\times b\times c\times c}{7\times a\times b\times c} \\ =-3a^{(1-1)}{b}^{(1-1)}{c}^{(2-1)} \\ =-3c \end{gathered}$$