If alpha, beta are the roots of quadrati...

If `alpha, beta` are the roots of quadratic equation `x^2 + px + q =0 ` then `gamma, delta` are the roots of `x^2 + px-r = 0,` then `(alpha-gamma )(alpha-delta)`

`q+r`

`q-r`

`-(q+r)`

`-(p+q+r)`

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