Question

. If 2 is a zero of polynomial 3x² + 5x -k then value of k is

a. 20
b. 21
c. 22
d. 23​

Answer 1

Answer:

The value of k is c.22

Step-by-step explanation:

Since 2 is a zero of polynomial 3$x^{2}$ + 5x - k , it will satisfy 3$x^{2}$ + 5x - k = 0

  Therefore, 3× $2^{2}$ + 5x - k = 0

                 ⇒ 3×4 + 5×2 - k = 0

                 ⇒ 12 + 10 = k

                 ⇒ k = 22

Answer 2

Answer:

c.22

Step-by-step explanation:

3x^2+5x-k

3×2^2+5×2-k=0

3×4+10-k=0

12+10-k=0

22-k=0

22=k

k=22 ans

Correct ans is c. 22

hope you thankfull