Question

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

Answer 1

`\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}}`