(x+y+1)(x+y-1)=______.
若|x-y+2|与(x+y-1)2互为相反数,则x=______,y=______.
已知y=x-1,则(x-y)2+(y-x)+1的值为______.
已知(x+y+2)2+|2x-3y-1|=0,则x+y=______.
设x,y∈R+且xy-(x+y)=1,则x+y的最小值为______.
(x+y+1)(x+y-1)=______.
若(x-2y+1)2+|x+2y-3|=0,则x=______,y=______.
已知|x+3|+(x+2y-1)2=0,则x+y=______.
当x=1,y=-2时,代数式x-(x+y)+(x+2y)-(x+3y)+…-(x+99y)=______.
1.若x=2,y=1,则(x-y)(x²+xy+y²)=______.
若2x+3y-1=y-x-8=x+6,则2x-y=______.
已知实数x,y满足(x+2)2+(y-3)2=1,则|3x+4y-26|的最小值为______.
已知x,y∈R,i为虚数单位,且(x-2)i-y=-1+i,则x+y=______.