Question

If $x=5,y=4$ , evaluate
(iii) $3y^2$.

Answer 1

Given : $3y^2$

substituting $y=4$, in the given expression

$3y^2=3\times (4{)}^2$

$=3\times 16$

$=48$

Hence, the value of $3y^2$ for $x=5,y=4$ is $48$ .