若|x+y-2|+[2xy-1] 2【这个2是平方】=0,求x2+6xy+y2的值

若1/x-1/y=2,求3x-2xy-3y/x-xy-y的值3x-2xy-3y/x-xy-y 不好意思，是3x-2xy-3y/x-2xy-y .(x+y-2)(x+y-2xy)+(xy-1)^2 若x-y=4,xy=1,求(-2xy+2x+3y)-(3xy+2y-2x)-(x+4y+xy)的值 若x-y=4,xy=1,则(2x+y-2xy)-(3x+2y+xy)-(4xy+3y-5x)= (x+y)(x+y+2xy)+(xy+1)(xy-1)(x+y)(x-y)+4(y-1) 计算3xy[2xy-x(y-2)+x-1] 若(1)xy>0,(2)xy<0,求|x|/x+|y|+|xy|/xy的值 {(x-y/x^2-2xy+y^2)-(xy+y^2/x^2-y^2)}*(xy/y-1) 若xy满足x²+2x+y-2√y-1=-1,求xy, 若x-y=1,xy=5,则x^2y-xy^2＝ 若x,y满足x^+2y^-2xy+1=0,求xy的值 1.（xy-1）^2-(x+y-2xy)(2-x-y)2.(x+y)(x+y+2xy)+(xy-1)(xy+1) 1若x+2y=0 ,xy不等于0,求分式 x^2+2xy / xy+y^2 (-1/3xy)^2•[xy(2x-y)-2x(xy-y^2)] xy(xy+1)+xy+3-2(x+y+1/2)-(x+y-1)^2因式分解 (-3分之1xy)的平方×[xy(2x-y)-2x(xy-y的平方)] 已知x+y=1,xy=-2,则x²y+xy²-2xy 因式分解（x+y)(x+y+2xy)+(xy+1)(xy-1)