Question

If $m=-7$ ,evaluate
(ii) $2m^2$ .

Answer 1

Given : $2m^2$

Substituting, $m=-7$ in the given expression

$2m^2=2\times (-7{)}^2$
$=2\times 49$
$=98$

Hence, the value of $2m^2$ for $m=-7$ is $98$.