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Let r (1) s(1) t be the roots of the equ...

Let `r _(1) s_(1) t` be the roots of the equation `x ^(3) + ax ^(2) +bx+c=0,` such that `(rs )^(2) + (st)^(2) + (rt)^(2) =b^(2)-kac,` then k =

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