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The one root of the equation x^2+p x+12=...

The one root of the equation `x^2+p x+12=0` is `4,` while the equation `x^2+p x+q=0` has equal roots, the value of `q` is

A

`49/4`

B

`4/49`

C

`4`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
One root of the equation
`x^2+px+12=0` is `4`
`⇒16+4p+12=0`
`:.p=−7`
as `x^2+px+q=0 `has equal roots.
...
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