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If x=4 , Eval...

Question

If $x = 4$ , Evalute
(ii) $5 x^{2} + 4 x$ .

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Solution

Given: $5 x^{2} + 4 x$ .

Substituting , $x = 4$ in the given expression,

$5 x^{2} + 4 x = 5 \times (4^{2}) + 4 \times 4$
$= 5 \times 16 + 16$
$= 80 + 16 = 96$
Hence, the value of $5 x^{2} + 4 x$ for $x = 4$ is $96$ .

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