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方程x2-px+6=0的解集为M,方程x2+6x-q=0的解集为N,且M∩N={...
方程x2-px+6=0的解集为M,方程x2+6x-q=0的解集为N,且M∩N={2},那么M∪N=( )
A.{2,3,6}
B.{-8,2,3}
C.{-8,2,4}
D.{2,3,8}
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