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If the roots of the equation x ^(2) + 2 ...

If the roots of the equation `x ^(2) + 2 bx + c =0` are `alpha and beta,` then `b ^(2) - c ` is equal to

A

`((alpha - beta ) ^(2))/( 4)`

B

`(alpha + beta) ^(2) - alpha beta `

C

`(alpha + beta) ^(2) + alpha beta `

D

`((alpha - beta ) ^(2))/( 2) + alpha beta `

Text Solution

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The correct Answer is:
A
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