The roots of the equation (q- r) x^(2) +...

The roots of the equation `(q- r) x^(2) + (r - p) x + (p - q)= 0` are

`(r-p)/(q - r) , (1)/(2)`

`(p - q)/(q - r) , 1`

`(q- r)/(p-q) , 1`

`(r- p)/(p - q) , (1)/(2)`

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