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If the vertex of the parabola y=x^(2)-16...

If the vertex of the parabola `y=x^(2)-16x+k` lies on x-axis,then the value of k is

A

16

B

8

C

64

D

-64

Text Solution

Verified by Experts

The correct Answer is:
C
`Let k =64 `
` thereforey=x^(2)-2x 8x +64rArry=(x-8)^(2)`
` rArr` it has vertex on X-axis.`
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