实数x,y满足x乘以1-x=y-2 + x-1.求3x²+xy-y²除以x²-xy+y²的值.x*根号1-x=根号y-2+根号x-1

实数x,y满足x乘以1-x=y-2 + x-1.求3x²+xy-y²除以x²-xy+y²的值.x*根号1-x=根号y-2+根号x-1 1）先化简：根号2x乘以根号y分之x乘以（根号x分之y除以根号y分之一）再求值.其中实数x,Y满足; 实数x,y满足y=(根号2x)+(根号1-2x),求y最大值. 已知实数x,y满足y=|x-1|,则x+2y的最大值是 已知实数x,y满足y=|x-1|若x+2y 已知实数x,y满足x-ay-1>=0,2x+y>=0,x 若实数X,Y满足Y=(根号（2X+1)/（4X-3))+（根号（2X+1)/(3-4X))+1,求X的平方乘以Y+XY+X的值? 已知实数x,y满足(x+y)^2=1,(x-y)^2=25,求x,y的值 已知实数x,y满足x²+y²-xy+2x-y+1=0 求x y 设实数x,y满足 x>=0 x-2y>=0 x-y-2 设实数x,y满足约束条件：x>=2;y>=x;2x+y 若实数x,y满足x-y+1》=0,x+y>=0,x 若实数x,y满足x-y+1>=0,x+y>=0,x 当实数x,y,满足约束条件{x>0 y>=x 2x+y+k 实数x,y满足{x-y+1>=0;y+1>=0;x+y+1 已知实数x,y满足y=x^2-2x+2(-1 已知实数 x,y满足x y大于0,且x平方乘以y等于2,求x y+x 的平方的最小值 已知实数x,y满足x-y