1.

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

Answer»

`a^(2) + B^(2)`
`a^(2)-b^(2)`
`2A^(2)-b^(2)`
`a^(2)-2B^(2)`

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