Question

If $m=3,n=7$ , evaluate
(iv)$4n^2$.

Answer 1

Given: $4n^2$

Substituting $m=3,n=7$ , in the given expression

$4n^2=4\times (7{)}^2$

$=4\times 49$

$=196$

Hence, the value of $4n^2$ for $n=7$ is $196$.