|x-1|+(x+y)2=0,则xy的值是______.
(2008•杭州一模)设实数x,y满足x2+2xy-1=0,则x+y的取值范围是______.
已知x>0,y>0,x+y+xy=8,则x+y的最小值是______.
设实数x,y满足x2+2xy-1=0,则x+y的取值范围是______.
实数x、y满足(1-i)x+(1+i)y=2,则xy的值是______.
若x-y=3,xy=-2,则xy2-x2y的值是______.
已知x+y=1,则代数式x3+3xy+y3的值是______.
设x,y∈R+且xy-(x+y)=1,则x+y的最小值为______.
若|2x+y-1|+(x-2y)2=0,则x2+xy+y2的值为______.
已知x>0,y>0,xy=x+2y,若xy≥m-2恒成立,则实数m的最大值是______.
已知x/y=3,则x²+xy/y²的值是______.
因式分解:(x+y)(x+y+2xy)+(xy+1)(xy-1)=______.
已知x>0,y>0,且x+y=xy,则u=x+4y的取值范围是 ______.