Question

Which of the following is the value of K, if one root of the quadratic equation

equation + − 8 = 0
− 4

A) 0 B) 4 C) 0 or 4 D) 2​

Answer 1

Answer:

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Step-by-step explanation:

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