如果多项式-3nx-3xy-3y-2mxy-2x+5mxy-2y+1与多项式(8xy-3y)-5xy-2(3xy-2x)的差不含二次,项求-n-m的值
如果多项式-3nx-3xy-3y-2mxy-2x+5mxy-2y+1与多项式(8xy-3y)-5xy-2(3xy-2x)的差不含二次,项求-n-m的值
数学人气:869 ℃时间:2019-11-13 21:03:10
优质解答
(-3nx-3xy-3y-2mxy-2x+5mxy-2y+1)- [(8xy-3y)-5xy-2(3xy-2x) ] =-3nx-3xy-3y-2mxy-2x+5mxy-2y+1 - 8xy+3y+5xy+6xy-4x =x(-3n-2-4) +y(-3+3)+ xy (-3-2m+5m-8+5+6) - 2y+1 =x(-3n-6)+xy(3m) -2y+1 =-x(3n+6) 3m...
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