Question

19.
If 2 is zero of polynomial x square – kx + 8 then
k =
A) 1
B) 3
C) 4
D) 6
​

Answer 1

d should be correct answer

Answer 2

correct option is D)

If 2 is the zero of polynomial x^2-kx+8 then,

(2)^2-k(2)+8=0

4-2k+8=0

4+8=2k

2k=12

k=12/2

k=6