Question

If difference between the roots of the equation x
2
-kx +8 =0 is 4 then the value of K is

Answer 1

Given: equation x

2

−kx+8=0, and one of the root is 4

To find the value of k

Sol:

x

2

−kx+8=0, if 4 is one of the root then it should satisfy the following condition

4

2

−k(4)+8=0

⟹16−4k+8=0

⟹4k=24

or k=6