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If the roots of the equation x^2 +px + q...

If the roots of the equation `x^2 +px + q = 0` and the roots of the equation `x^2 +qx + p = 0` differ by the same quantity, then the value of p + q is ( (A)-1 48. 9) 6 (B)-2 (C)-4 (D) none

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