Question

Subtract :

$3a{b}^2$ from $7a{b}^2$

Answer 1

On subtracting $3a{b}^2$ from $7a{b}^2$, we get

$$\begin{gathered} =7a{b}^2-3a{b}^2 \\ =(7-3)a{b}^2 \\ =4a{b}^2 \end{gathered}$$