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Let alpha,beta be the equation x^2-px+r=...

Let `alpha,beta` be the equation `x^2-px+r=0` and `alpha/2,2beta` be the roots of the equation `x^2-qx+r=0.` Then, the value of r is

A

2/9(p-q)(2q-p)

B

2/9(q-p)(2p-q)

C

2/9(q-2p)(2q-p)

D

2/9(2p-q)(2q-p)

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The correct Answer is:
D
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