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x^(2) + 5x^(2) + px + q =0 and x^(3) +...

`x^(2) + 5x^(2) + px + q =0` and `x^(3) + 7x^(2) + px + r =0`, two roots in common. If their third roots are `lambda_(1)` and `lambda_(2)` respectively, then `|lambda_(1) + lambda_(2)|` is equal to:

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