若实数X,Y满足√X+2Y-4+{（2X+Y-5）*（2X+Y-5）}=0,则（X+Y）*（X+Y）等于什么?

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x+y+4x-2y-4=0,则√（x+y）的最大值是多少 若实数x,y满足y=√(4-x²)+2√(x²-4)+8/(x+2),求y的x次方的值 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 +1=0,则X²-6X+Y²-2Y的最大值是多少 若实数x、y满足x*x+y*y-2x+4y+5=0,求x-y的值 已知实数X,Y满足2 已知实数xy满足x+2y 已知实数xy满足 x+y-2 实数x,y满足约束条件.求范围实数x,y满足约束条件x-y+2>=0 x+y-4>0x