Question
If $m = 9$ and $n = − 2,$ evaluate $2m^2n$

Answer

$2m^2n$
$= 2 \times m \times m \times n$
$= 2 \times 9 \times 9 \times (− 2)$
$= 2 \times 81 \times (− 2)$
$= − 324$

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