If m = − 8, evaluate: m^2 + 9m - Vidyadip

Question

If m $= − 8$, evaluate:
$m^2 + 9m$

✓

Answer

$m^2 + 9m$
$= (m \times m) + (9 \times m)$
$= (− 8 \times − 8) + (9 \times (− 8))$
$= 64 + (− 72)$
$= 64 − 72$
$= − 8$

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