x^2+y^2=y和x^2+y^2=x的图像怎么画

x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 已知x-y=3,求[（x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值 已知x+y=a,2x-y=-2a,求[（x/y-y/x)/(x+y)-x(1/x-1/y)]/[(x+1)/y]的值 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 已知x≠y,x^2-x=y^2-y,求x+y的值. y=3(x-y),x=2(x-y)求x,y的值 x,y 满足x(x-2)-y(y-6)=-10,求x,y的值 若x*x+y*y=x+y-1/2,求x,y的值如题 正数x,y满足x-y=2xy,求x-y/x+y的值. 求y''+2y'+y=e^-x/x的通解y''+2y'+y=（e^-x）/x 填空：x-y/x+y=( )/x^2-y^2 （x-y)2•(y-x)³(x-y)=? 已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值? 若x*x-4y*y=-15,x+2y=3,求x和y的值 X+Y=5 2X+5Y=20 x和y的解 用ab表示x,y的平方和,X和y的积的平方,y/x+x/y（x*x+2xy+y*y）=a（x*x-2xy+y*y）=b 已知x²+y²=4,求x+y和2x+y的最小值. 若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值