Question

4) If 2 is the root of the equation x²+kx+12=0 ,then the value of k is...
a) 8
b)-8
c)6
d)-1​

Answer 1

Answer:

k=-8

Step-by-step explanation:

2 is the root of given equation. i,e x=2

so, put x=2 in given equation

2^2+2k+12=0

4+2k= -12

2k= -12-4

2k= -16

k= -8