Question

For what value of k is,3 a zero of polynomial2x^2 +x+k

Answer 1

Answer:

p(x)=2x²+x+k

p(3)=2×3² +3+k

     =2×9+3+k

     =18+3+k

      =21+k

21+k=0

k= -21

p(3)=0