(2yx^3-3x^2y+4xy^3)除以(-2x)除以(-y)五分钟之内,

xy-3xy+2yx-yx 3xy+xy+2x²y+yx²+3x²y等于多少 3xy-3xy-xy+2yx 因式分解x^2+xy+3x+3yx^2+xy+3x+3y 因式分解 2x²y+3yx²-4yx²-6xy²+3x-5-5x其中x=2y=2分之1 已知X-Y=4XY,求(2X+3Y-2Y)/(X-2YX-Y)的值 xy—3xy＋2yx—yx 已知x-y=6,xy=-1,求(2x+3x-2xy)-(x+4y+xy)-(3yx-2x+2y)的值 合并同类项 -2x立方y-3xy立方+4yx立方 2x²y+3xy²+5xy-6yx+2 合并同类项 合并同类项 2x的平方y+3xy的平方+5xy-6yx+2 化简：3x^2-(7x-(4x-3)-2x^2) (2xy-y)-(-y+yx) （1）（2xy-y）-(-y+yx)(2)3x²-[7x-(4x-3)-2x²] x^2y-3xy^2+2yx^2-y^2x化简 X^2Y-3XY^2+2YX^2-Y^2X=? 化简 x²y-3xy²+2yx²-y²x x²y-3xy²+2yx²-y²x x²y－3xy²+2yx²－y²x,急用!