帮我求下两圆交点x^2+y^2-12x-2y-13=0x^2+y^2+12x+16y-25=0
已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值
设Z=X+Y,其中X,Y满足X+2Y>=0,X-Y
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y,
已知x^2+y^2-10x-12y+61=0,求x/y-y/x的值
设x>1,y>0,若x^y+x^-y=2根号2,则x^y-x^-y等于
已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?
[x(x-y)-y(x-y)+(x+y)(x-y)]÷2x其中x=2012 y=2013
x²+4y²-2x+12y+10=0求X,Y值
变量x,y满足x-2y=0,x
求过圆C1:x^2+y^2-12x-2y-3=0和圆C2:x^2+y^2+12x+16y-25=0的交点的面积最大的圆的
已知x.x+y.y+8x+6y+25=0,求代数式(x.x-4y.y)/(x.x+4xy+4y.y)-x/(x+2y)的