x^2+y^2=10,x-y=4,求x,y x+y=-5,xy=4,求x-y x+y=9,xyx^2+y^2=10,x-y=4,求x,y x+y=-5,xy=4,求x-yx+y=9,xy=10,求x^2+y^2,x^3+y^3,x^4+y^4

如果|X|=4 |Y|=2 且|X+Y|=X+Y 求X+Y x,y 满足x(x-2)-y(y-6)=-10,求x,y的值 已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值? 已知2y-x=-3,求[4y(2x-y)-2x(2x-y)]/(2x-y 已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y² x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 2x-y=2,求[(x²+y²)-(x-y)²+2y(x-y)]÷4y 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 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 已知x+y=4,x^2+y^2=10,求(x-y)^2 x^2+4y^2-6x+4y=-10求x,y的值 已知：4x^2+y^2-4x-6y+10=0,求y/x-x/y的值 x²+4y²-2x+12y+10=0求X,Y值 若x.y满足x^2+4x+y^2-10y+29=0.求x+y的值 已知x²-y²=10,求[（x+y）³-2y(x+y)²-4(x+y)]÷(x+y)的值 已知x²-y²=10,求[(x+y)的三次方-2y(x+y)²-4(x+y)]÷(x+y)的值 已知x的平方-y的平方=10求【(x+y)的立方-2y(x+y)的平方-4(x+y)】/(x+y) x^2+4y^2-6x+4y+10=0,求x^4-y^4/(x+2y)(x-2y)*x+2y/xy^2+y^3除以（x^2+y^2/y)^2的值