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If one root of the equation x^2+px+12=0 ...

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

A

4

B

12

C

3

D

49/4

Text Solution

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The correct Answer is:
D
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Knowledge Check

  • If p and q are the roots of the equation x^2+px+q =0, then

    A
    p=1,q=-2
    B
    p=0,q=1
    C
    p=-2,q=0
    D
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  • If the roots of the equation x^2+2px+q=0 are real and unequal then

    A
    `p^2 gt q`
    B
    `p^2 gt q^2`
    C
    `p^2 lt q`
    D
    `p^2 lt q^2`

  • If , p , q are the roots of the equation x^(2)+px+q=0 , then

    A
    p=1,q=-2
    B
    p= 0 ,q = 1
    C
    `p=-2,q=0`
    D
    `p=-2,q=1`

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