(-x-2y)(x²-2xy+4y²)
(-x-2y)(x²-2xy+4y²)
化简(x²y-4y²)/(x²+4xy+4y²)*[(4xy)/(x-2y)+x
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
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
1.化简:x²-4y²/x²+y²+2xy÷2y+x/x²+xy.
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)
(x-6y)/(x²-4y²)+(2y)/(x²-2xy)
计算:x²+2xy+y²/xy-y².x²-2xy+y²/xy+y
2x+y=0,求4x²+2xy(x+y)+y³