化简3Xy+3(4yx-2x)-2(2xy-2x)_____?
xy-3xy+2yx-yx
已知x-y=4xy,则2x+3xy-2yx-2xy-y
3xy-3xy-xy+2yx
3xy+xy+2x²y+yx²+3x²y等于多少
已知y=3xy+x,求代数式2x+3xy−2yx−2xy−y
已知代数式3-2xy+3yx^2+nxy-4x^2y中不含XY项,求N的值
已知3x2+xy-2y2=0,求(x+yx-y+4xyy
3x^2y-3xy^2+6yx^2-9y^2x
实数x、y、z满足x=6-3yx+3y-2xy+2z
-x^2y+5xy^2-yx^2合并同类项
.先化简,后计算.[2x(x²y-xy²)+xy(xy-x²)]/x²yx=20
-3xy²-8yx-2x的因式分解,要最简的.