下列去括号的结果正确的是( )
A.x2-3(x-y+z)=x2-3x+3y-z | B.3x-[5x-(2x-1)]=3x-5x-2x+1 |
C.a+(-3x+2y-1)=a-3x+2y-1 | D.-(2x-y)+(z-1)=-2x-y+z-1 |
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下列去括号的结果正确的是( )
A.x2-3(x-y+z)=x2-3x+3y-z | B.3x-[5x-(2x-1)]=3x-5x-2x+1 |
C.a+(-3x+2y-1)=a-3x+2y-1 | D.-(2x-y)+(z-1)=-2x-y+z-1 |
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