Question

If x=-3 is one root of x2 -kx+6 = 0 then value of Kis---
a. 2
b.-5 c.3
d. -1​

Answer 1

Step-by-step explanation:

given,

x=3

root of x2-kx+6=0

k=

substute x=3

6-3k+6=0

3k=0

k=3-0

k=3

so

option "c"

Answer 2

Answer:

option b. -5 is correct answer

Step-by-step explanation:

if x= -3

then,

(-3)² -k×(-3) +6 = 0

9+3k+6=0

15 +3k =0

3k = -15

k= -15/3 = -5 answer