已知x^2-xy=14,xy-y^2=-11,求x^2-2xy+y^2的值

已知x+y=1,xy=-2,则x²y+xy²-2xy 已知x-xy=8,xy-y=-9,求x+y-2xy的值 由已知x+y=-2,xy=3那么2(x+xy)-[(xy-3y)-x]-(-xy)等于多少? 已知x^2-xy=14,xy-y^2=-11,求x^2-2xy+y^2的值 已知x²-xy=14,xy-y²=-11,求x²-2xy+y²的值 已知xy^2=-2,求-xy（x^2y^5-xy^3-y)的值. 已知xy^2=-2 求-xy(x^2y^5-xy^3-y) 已知xy^2=-2xy(x^2y^5-xy^3-y) 已知x^2-xy=5,xy-y^2=-3求3(x^2-xy)-xy+y^2 已知x:y=3:2,求(x²+3xy)/(xy+2xy) 已知,x²+xy=14,y²+xy=2(x>y>0)求x+y.x-y 已知,x²+xy=14,y²+xy=2(x>y>0)求x+y.x-y 已知,x²+xy=14,y²+xy=2(x>y>0)求x+y.x-y 已知xy为正整数,3xy=2x+3y+5.求xy=? 已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理.已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理. 已知X+y=6,xy=7 求x^2y+xy^2=已知X+y=6,xy=7 x^2y+xy^2 已知x-xy=10,xy-y=2,则x-y=（ ）,-2xy+x+y=（ ）. 已知x-y=3xy,则2x+3xy-2y除以x-2xy-y=?