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If alpha,beta,gamma are the roots of x^3...

If `alpha,beta,gamma` are the roots of `x^3+px^2+qx+r = 0 ` then `sum(beta^2+gamma^2)/(betagamma) =` (i)`(pq)/r-1` (ii) `(pq)/r-2` (iii) `(pq)/r-3` (iv) `(pq)/r-4`

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