填空,√x^4y²(x²+2xy+y²)=
已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y²
已知2X-3√xy-2y=0(x>0)求2x²+xy-9y²分之x²+4xy-16y
2x+y=0,求4x²+2xy(x+y)+y³
已知x²+y²-2x+4y+5=0,求X^4-y^4/2x^2+xy-y²·2x-y/xy
(-x-2y)(x²-2xy+4y²)
化简(x²y-4y²)/(x²+4xy+4y²)*[(4xy)/(x-2y)+x
已知X²+Y²+X²Y²-4XY+1=0 求:(X-Y)^2008-(XY)^2
x²/xy-x/y
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
X²+2xy+y²/xy乘x²-2xy+y²/xy+y²=
已知2x-y=10,求式子[(x^2+y^2)-(x-y)^2+2y(x-y)]/4y (4xy-2y²)/4
已知x²+y²-4x-2y+5=0,求代数式[(√x-√y)²+4√xy]/(x+√xy)