M=2a(a-2)+3,N=(a-1)(a-3),a属于实数,则有A.M>N,B.M≥N C.M<N D M小于等于N,

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M=2a(a-2)+3,N=(a-1)(a-3),a属于实数,则有A.M>N,B.M≥NC.M<NDM小于等于N,M=2a(a-2)+3,N=(a-1)(a-3),a属于实数,则有A.M>N,B.M≥

M=2a(a-2)+3,N=(a-1)(a-3),a属于实数,则有A.M>N,B.M≥N C.M<N D M小于等于N,
M=2a(a-2)+3,N=(a-1)(a-3),a属于实数,则有A.M>N,B.M≥N C.M<N D M小于等于N,

M=2a(a-2)+3,N=(a-1)(a-3),a属于实数,则有A.M>N,B.M≥N C.M<N D M小于等于N,
M-N=2A^-4A-(A^-2A-3)
=(A-1)^+2>0
SO M>N 选A