已知M=x+3y-3z,N=-2x+5y-z且M+N+P=0.求多项式P
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![已知M=x+3y-3z,N=-2x+5y-z且M+N+P=0.求多项式P](/uploads/image/z/13341510-54-0.jpg?t=%E5%B7%B2%E7%9F%A5M%3Dx%2B3y-3z%2CN%3D-2x%2B5y-z%E4%B8%94M%2BN%2BP%3D0.%E6%B1%82%E5%A4%9A%E9%A1%B9%E5%BC%8FP)
已知M=x+3y-3z,N=-2x+5y-z且M+N+P=0.求多项式P
已知M=x+3y-3z,N=-2x+5y-z且M+N+P=0.求多项式P
已知M=x+3y-3z,N=-2x+5y-z且M+N+P=0.求多项式P
M+N=x+3y-3z-2x+5y-z=-x+8y-4z
M+N+P=0,P=-(M+N)
P=-(-x+8y-4z)=x-8y+4z
M,N带入最x后一式,移项,p=x-8y+4z