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If alpha and beta are the roots of x^(...

If `alpha and beta ` are the roots of `x^(2)-ax+b^(2)=0` , then `alpha^(2) +beta^(2)` is equal to_______

A

`a^(2) + b^(2)`

B

`a^(2)-b^(2)`

C

`2a^(2)-b^(2)`

D

`a^(2)-2b^(2)`

Text Solution

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The correct Answer is:
D
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