已知实数x,y满足x^2+3X+y-3=0,则x+y的最大值为

已知实数x,y满足约束条件x+y>3,y 已知实数x,y满足2x+5y>=10;2x-3y>-6;2x+y 已知实数x.y满足根号(x+y-8)+根号(8-x-y)=根号(3x-y-4)+根号(x-2y+7),求x,y 已知实数x,y满足x^2+3X+y-3=0,则x+y的最大值为 已知实数x,y满足y=x^2+5x-4,则3x-2y最大值为 已知实数x,y满足x²-x+y=2,则3x-y的最小值为_______. 已知实数x、y满足2x2-7xy+3y2=0,求x：y 已知实数x,y满足x-y 已知实数X,Y满足{|x+y| 已知实数x,y满足下x^2+根号2y=根号3,y^2+根号2x=根号3,求x/y+y/x 已知实数x,y满足x²+√2 y=√3,y²+√2 x＝√3,则x/y+y/x=? 已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 已知实数x,y满足x^+y^+2x-2根号3y=0(1)x^+y^的最大值 （2）x+y的最小值 已知实数x,y满足x+y+2x-2√3y=0,求：㈠x+y的最大值；㈡x+y的最小值? 已知实数x,y,满足x-√x-1=√y+3-y,则x+y最大值是? 已知实数x,y满足（x+y)(x+y+3)-4=0则x+y的值是 已知实数x,y满足3^x=6,2*3^y=3,那么x+y=