下列去括号中,正确的是( )
A.a2-(2a-1)=a2-2a-1 | B.a2+(-2a-3)=a2-2a+3 |
C.3a-[5b-(2c-1)]=3a-5b+2c-1 | D.-(a+b)+(c-d)=-a-b-c+d |
A.a2-(2a-1)=a2-2a-1 | B.a2+(-2a-3)=a2-2a+3 |
C.3a-[5b-(2c-1)]=3a-5b+2c-1 | D.-(a+b)+(c-d)=-a-b-c+d |