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If alpha, beta, gamma and delta are the ...

If `alpha, beta, gamma` and `delta` are the roots of the polynomial eqauation `2x^4 + 5x^3 - 7x^2 - 8 = 0`, find a quadratic equation with integer corddicients whose roots are `alpha + beta + gamma + delta` and `alpha beta gamma delta`.

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The correct Answer is:
`2x^2+13x+20=0`
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