1. -(mn-1)+(m-n)=-mn+1+m+n2. x-(5x-3y)+(2x--y)=-2x+2y计算结果对吗
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1. -(mn-1)+(m-n)=-mn+1+m+n2. x-(5x-3y)+(2x--y)=-2x+2y计算结果对吗
1. -(mn-1)+(m-n)=-mn+1+m+n
2. x-(5x-3y)+(2x--y)=-2x+2y
计算结果对吗
1. -(mn-1)+(m-n)=-mn+1+m+n2. x-(5x-3y)+(2x--y)=-2x+2y计算结果对吗
-(mn-1)+(m-n)=-mn+1+m-n
2. x-(5x-3y)+(2x--y)=x-5x+3y+2x-y
=-2x+2y
1.-mn+1+m-n
2.x-5x+3y+2x-y=-2x+2y
已知m-n=2,mn=1,求多项式(-2mn+2mn+3n)-(3mn+2n-2m)-(m+4n+mn)的值
已知m-n=2,mn=1,求多项式(-2mn+2mn+3n)-(3mn+2n-2m)-(m+4n+mn)的值
1/M+1/N=5 (3M+MN+2N) / (M-MN=3N)
因式分解:mn+m-n-1=( )-( )=( )( )
mn=1 m+n=2
m+n=-1 mn=-2
已 知m-n=4,mn=-1,求:(-2mn+2m+3n)-(3mn+2n-2n)-(m+4n+mn)的值
已知m-n=4,mn=-1,求(-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值.
已知m-n=2,mn=1,求多项式(2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值
若m-n=4,mn=-1,求(-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)
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