m²-5m-6=0(m-6)(m+1)=0所以 m=6或m=-1当m=6时2m²-5m+36/m²=2×6²-5×6+36/6²=72-30+1=43当m=-1时2m²-5m+36/m²=2×(-1)²-5×(-1)+36/(-1)²=2+5+36=43所以2m²-5m+3...