1.

Ifalpha , beta , gammaare the rootsofx^3+ px^2+qx-r=0thenalpha^2+ beta^2 + gamma^2 =

Answer»

`p^2 -2Q`
`p^3 -3PQ +3R`
`p^4 -3p^2 Q +2q^2 `
`2q`

ANSWER :A


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