Question

If $x=8,y=2$, evaluate
(ii) $5x^{2}y$.

Answer 1

Substituting $x=8,y=2$ in the given expression ,

$5x^{2}y=5\times (8{)}^2\times 2$

$=5\times 64\times 2$

$=640$

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Hence, the value of $5x^{2}y$ for $x=8,y=2$ is $640$.