Question

Find the value of k ,if -1 is a zero of the polynomial x square + 8x +k ?

Answer 1

Answer:

putting x=-1 in equation we get

(-1)²+8(-1)+k =0

1-8+k=0

k=7

Answer 2

Answer:

Given,

-1 is a zero of P(x)= x²+8x+k

Now,

P(-1) => (-1)²+8×(-1)+k=0

=> 1-8+k=0

=> -7+k =0

=> k = 7

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