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The condition that x^3 - px^2 +qx-r=0 ma...

The condition that `x^3 - px^2 +qx-r=0` may have two of its roots equal to each other but opposite in sign is

A

r = pq

B

`r=2p^3 +pq`

C

`r=p^2q`

D

None of these

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The correct Answer is:
A
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