If alpha and beta are the roots of the e...

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

A

`a^2+2b^2`

B

`a^2-2b^2`

C

`a^2-2b`

D

`a^2+2b`

Verified by Experts

The correct Answer is:

B

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