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  • 13-07-2021
  • Mathematics
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Evaluate the expression x=-7. x2+4x-5

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ᴜᴋɪʏᴏ
ᴜᴋɪʏᴏ ᴜᴋɪʏᴏ
  • 13-07-2021

[tex]\sf \: Given \: x = - 7[/tex]

[tex]\sf \: Substitute \: the \: value \: of \: x \: as \: - 7 \: in \: the \: eq.\: \: {x}^{2} + 4x - 5[/tex]

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

Answer ⟶ [tex]\boxed{\bf{16}}[/tex]

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