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Question

Evaluate: $5 x^{2} - 7 x$ given x=2

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Solution

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$5 x^{2} - 7 x$
$a t x = 2$
$5 {(2)}^{2} - 7 (2)$
$= 5 (4) - 14$
$= 20 - 14$
$= 6$

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