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

If `alpha and beta` are the roots of the equation ` x^(2) + px + q =0,` then what is `alpha ^(2) + beta ^(2)` equal to ?

A

`p ^(2) - 2q`

B

` q ^(2) - 2p`

C

`p ^(2) + 2q`

D

`q ^(2) - q`

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