若x²-y²-x+y=(x-y)*A,则A=__________.
因式分解 a²(y-x)+(x-y)
若集合A={(x,y)|y=x²,x∊R},B={(x,y)|y=2x²+2x-3,x&
若集合A={(x,y)/x²+y²=1},B={(x,y)/y²=2(x+)},则A∩B=
若(-x+y)·A=x²+y²,则A等于 过程最好清晰
已知集合A={(x,y)|x²+y²≤1.x.y∈R},B={(x,y)||x|+|y|≤2.x.y
已知x=1/y,则(x-1/x)(y-1/y)等于 A、2x² B、2y² C、x²+y&
已知(x-3)²+|y+5|=0,则xy-y^x=__________
已知集合A={y/y=x²}B={y/y=x}则A∩B=?
⒈-4x^ay+x²y^b=-3x²y,则a+b= ⒉若x+y3,xy=1,则x²+y
已知集合A={(x,y)|(y-2)/(x-1)=a+2,x,y∈R},B={(x,y)|(a²-4)x+(a
A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²+3x-y,若x=
设A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²-3x-y,若x