若(x+y)(x-y)^2-xy(x+y)=A(x+y),则A=什么
如果x/x-y=a,则分式2x^2y-2xy^2/3x^2y
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
设A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²+3x-y.若x
已知A+2(x-xy+y)=2x+3y,则A=?
若A=2x²-4xy-2y²-2x+2y,B=4x²-6xy+2y²-3x-y.
设A=2X²-3xy+y²-x+2y,B=4x²-6xy+2y²-3x-y,若|
设A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²+3x-y 若|
设A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²-3x-y,若│
设A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²-3x-y,若|
已知:A=X*X-3xy+y*y,B=2x*x+xy-3y*3y.求A+B,A-B,A+2B
若正实数x.y满足x+y=xy,则x+2y的最小值