1.2/m²-4-1/2m-4 =2/(m+2)(m-2)-1/2(m-2)=4/2(m+2)(m-2)-(m+2)/2(m+2)(m-2)=(4-m-2)/2(m+2)(m-2)=-1/2(m+2)解方程：1.x/x-1-2/x=1 两边乘以x(x-1)得x²-2(x-1)=x(x-1)x²-2x+2=x²-x-x=-2∴x=2检验...