解方程x²-4xy+4y²+x-2y-2=0,3x+2y-11=0
解方程:x²+2xy+6x+2y²+4y+10=0
解方程x四方-x²+2xy+y²+1=0 x²+2xy+6x+2y²+4y+10
解方程x²-4xy+4y²+x-2y-2=0,3x+2y-11=0
2x+y=0,求4x²+2xy(x+y)+y³
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
已知3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)}
解方程x²-2xy+y²=9,x²+4xy+4y²+x+2y=2 2x-1/y=
已知x²+y²-2x+4y+5=0,求X^4-y^4/2x^2+xy-y²·2x-y/xy
实数x,y满足方程x^2-3xy+3y^2+4x-18y+52=0
解方程x^2y^2-8xy+4x^2+y^2+4=0
已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y²
已知X²+Y²+X²Y²-4XY+1=0 求:(X-Y)^2008-(XY)^2