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

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

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The correct Answer is:
`-(q+r)`
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RESONANCE ENGLISH-EQUATIONS -EXERCISE-1 (PART -1: PRE RMO)
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