Question

13. If one zero of the quadratic polynomial x2 + 3x + k is 2, then the value of k is: -
(a) 10
(b) - 10
(c) 5
(d) none of these​

Answer 1

Answer:

Correct option is

B

−10

2 is a zero of x2+3x+k.

Thus, (2)2+3(2)+k=0

k+10=0

k=−10