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x^(3)+5x^(2)+px+q=0 and x^3+7x^2+px+r=0 ...

`x^(3)+5x^(2)+px+q=0` and `x^3+7x^2+px+r=0` have two roots in common. If their third roots are `r_1` and `r_2` respectively then find the value of `r_1` and `r_2`

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