解分式方程:
解方程时,去分母得( )
A.(x-1)(x-3)+2=x+5 B.1+2(x-3)=(x-5)(x-1)
C. (x-1)(x-3)+2(x-3)=(x-5)(x-1) D.(x-3)+2(x-3)=x-5
如果关于x的方程无解,则m等于( )
A.3 B. 4 C.-3 D.5