Question

If $m=-7$ ,evaluate
(iii) $2m^3$.

Answer 1

Given : $2m^3$

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

$2m^3=2\times (-7{)}^3$
$=2\times (-343)$
$=-686$

Hence, the value of $2m^3$ for $m=-7$ is $-686$.