if the roots of the equation z^(2) + ( ...

if the roots of the equation ` z^(2) + ( p +iq) z + r + is =0` are real wher p,q,r,s, `in` ,R , then determine ` s^(2) + q^(2)r`.

`pqs=s^(2)+q^(2)r`

`pqr=r^(2)+p^(2)s`

`prs=q^(2)+r^(2)p`

`qrs=p^(2)+s^(2)q`

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