求通过圆X^2+y^2+2x-4y-5=0的和直线2x+y+4=0的两个交点,且面积最小的圆的方程

已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 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 x*x+y*y-2x+4y+5=0求x, 如果|X|=4 |Y|=2 且|X+Y|=X+Y 求X+Y 求(X+Y)(X-Y)(X²+Y²),X=5 Y=2, (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) 已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值 2x-y=2,求[(x²+y²)-(x-y)²+2y(x-y)]÷4y 将y=2x²+4x通过配方 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)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=? 已知4x^2+y^2-4x+4y+5=0,求x,y x^2-x+y^2+2y+5/4=0 求x^-1+y^0 4x-3y=5 x^2+y^2=1 求x,y 求5x-2y=x-y=4x-3y-2的解 3x+4y-5=0 x^2+y^2=1求x.y