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