Question

Find the value of k for which 3 is a zero of polynomial 2x2

+ x + k​

Answer 1

Answer:

k= -21

Step-by-step explanation:

x= 3 is the zero of the polynomial

p(x)= 2x²+x+k

p(3)= 2(3)²+3+k

= 2(9)+3+k

= 18+3+k

= 21+k

Since x= 3 is the zero of the polynomial. Therefore,

21+k= 0

k= -21

Hope It Helps :)

Answer 2

Answer:

-21

Step-by-step explanation:

2x^2+x+k=0

2(9)+3+k=0

21+k=0

k=-21

Hope it helps.