已知圆x^2+y^2+4x+10y+4=0
已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y
已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
已知:4x^2+y^2-4x-6y+10=0,求y/x-x/y的值
已知4x=9y求(1)x+y/y (2)y-x/2x
已知x^2-4x+y^2-10y+29=0,求x^2y^2+2x^3y^2+x^4y^2的值
已知X^2-4X+Y^2-10Y+29=0,求X^2Y^2+2X^3Y^2+X^4Y^2
已知x^2-4x+29-10y+y^2=0,求x^2y^2+2x^3y^2+x^4y^2
已知X,Y,满足(X+3Y)(X-3Y)=-10(Y^2-6/5)和2X(Y-1)+4(1/2X-1)=0
已知x^2+4y^2-4x+4y+5=0,求(y^4-x^4)/(y-2x)(x+y)*2x-y
已知3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)}
已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值