若实数x、y满足x^2+4x+y^2-6y+12=0,则x=（）y=（）?是13,打错了

若实数X,Y满足X²+Y²+4X-2Y +1=0,则X²-6X+Y²-2Y的最大值是多少 若实数x,y满足x²+y²-2x+4y=0,求x-y的最大值 若实数x,y满足x^2-xy-y^2 =0,则x/y=? 若正实数x.y满足x+y=xy,则x+2y的最小值 若实数x,y满足不等式组x>=0 ,y>=0,x+2y 已知实数x,y满足y=|x-1|若x+2y 若实数x y满足,4x^2-y^2-4x+6y+10=0,求x^2+y^2的值 若实数x,y满足x^2+y^2-6x-4y+12=0,则x^2+y^2的取值范围是 若实数x、y满足x^2+4x+y^2-6y+13=0,求x,y的值 若实数x、y满足x^2+4x+y^2-6y+13=0,求x 、y的值. 若实数x、y满足x^2+4x+y^2-6y+12=0,则x=（）y=（）?是13,打错了 已知实数x,y满足x^2+y^2-6x-8y+21=0,若4x+3y+c 若实数x,y满足x+y-4 已知实数x.y满足(x+2)^2+y^2( 若实数x,y满足不等式组｛x+y≥2 ｛2x-y≤4 ｛x-y≥0 ,则2x+3y的最小值是? 若实数x、y满足x平方+y平方-4x-2y+5=0,求根号8y-2x分之（根号x）+y 若实数X,Y满足x²+y²-4x-2y+5=0求√x+y/√8y-2x 若实数x、y满足x*x+y*y-2x+4y+5=0,求x-y的值