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If one root of the quadratic equation ax...

If one root of the quadratic equation `ax^(2)+bx+c=0` is double the other then which one of the following is correct?

A

`b^2=3ac`

B

`2b^2=5ac`

C

`2b^2=9ac`

D

`2b^2gt9ac`

Text Solution

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The correct Answer is:
C
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