Question

If (x-3) is a factor of the polynomial (2x^2+x+k), find k.

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Answer 1

Answer:

k=-21

Step-by-step explanation:

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

p(x)=x-3

p(x)=0

x-3=0

x=3

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

p(3)=18+3+k

p(3)=21+k

p(3)=0

21+k=0

k=-21