Question

What is the value of k in the polynomial xsquare+8x+k if -1 is zero of the polynomial?

Answer 1

Answer:

x=-1

1+-8+k=0

-7+k=0

k=7

Answer 2

Step-by-step explanation:

x^2+8x+k

if x=-1

therefore,

(-1)^2+8×(-1)+k

1+(-8)+k

-7+k

since, -7+k=0

therefore,k=7

thanks buddy

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