1.

If every pair from among the equations x^(2)+px +qr=0, x^(2)+qx +rp=0 and x^(2)+rx +pq=0 has a common root, then the sum of the three common roots is

Answer»

`2(p+q+r)`
`p+q+r`
`-(p+q+r)`
PQR

ANSWER :B


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