Question

the value of 5x^+6x+7 at x=-1

Answer 1

Answer:

Your question is complete there is no power of x in the first variable

Answer 2

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${\sf{If\:x\:=\:-1}}$

${\sf{5x^2\:+\:6x\:+\:7}}$

$\implies{\sf{5(-1)^2\:+\:6(-1)\:+\:7}}$

$\implies{\sf{(-5)\:+\:(-6)\:+\:7}}$

$\implies{\sf{-11\:+\:7}}$

$\implies{\underline{\boxed{\sf{-4}}}}$

$\therefore{\underline{\sf{\blue{5x^2\:+\:6x\:+\:7\:=\:-4}}}}$

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