若4x²+2xy+y²-y+4=4√(3x²-y)
已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y²
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
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│
已知2X-3√xy-2y=0(x>0)求2x²+xy-9y²分之x²+4xy-16y
3x²y+xy²-[2xy²-4x²y+(x²y-2xy²)
(2x²y-3xy²)-3(x²y-2xy²)+2(x²y-4xy
2x+y=0,求4x²+2xy(x+y)+y³
(-x-2y)(x²-2xy+4y²)