Question

If 3 is a zero of the polynomial 2x×x+x+k , find the value of 'k'​

Answer 1

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Answer 2

Answer:

p(x)=2x^2+x+k

3 is a zero of p(x)⇒ given

p(3)=2(3)^2+3+k=0

18+3+k=0

21+k=0

k=-21

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