化简(x²y-4y²)/(x²+4xy+4y²)*[(4xy)/(x-2y)+x
化简(x²y-4y²)/(x²+4xy+4y²)*[(4xy)/(x-2y)+x
(-x-2y)(x²-2xy+4y²)
1.化简:x²-4y²/x²+y²+2xy÷2y+x/x²+xy.
已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y²
3x²y+xy²-[2xy²-4x²y+(x²y-2xy²)
(2x²y-3xy²)-3(x²y-2xy²)+2(x²y-4xy
化简4xy-3y²-3x²+xy-3xy-2x²+x²-2y²
x²+y²+2xy分之x²-4y² ÷x²+xy分之2y+x
(x²+2xy+y²分之x²-4y²)÷(x²+xy分之x+2y)
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
(x-6y)/(x²-4y²)+(2y)/(x²-2xy)
2x+y=0,求4x²+2xy(x+y)+y³