Evaluate the expression x=-7. x2+4x-5

Kamil Karkus asked Feb 27, 2022

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Kamil Karkus asked Feb 27, 2022

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15 votes

$\sf \: Given \: x = - 7$

$\sf \: Substitute \: the \: value \: of \: x \: as \: - 7 \: in \: the \: eq.\: \: {x}^(2) + 4x - 5$

$\sf \: {x}^(2) + 4x - 5 \\ \sf = ( - 7) ^(2) + 4( - 7) - 5 \\\sf = 49 - 28 - 5 \\ \sf =\underline 1\underline6$

Answer ⟶
$\boxed{\bf{16}}$

Onnodb answered Mar 4, 2022

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