实数x'y满足x≥y≥1和2x^2-xy-5x+y+4=0求x'y的值

实数x'y满足x≥y≥1和2x^2-xy-5x+y+4=0求x'y的值 实数X、Y满足X≥Y≥1和2X^2-XY-5X+Y+4=0,则X+Y= 实数x y满足x≥y≥1和2x²-xy-5x+y+4=0求x+y之值 已知实数xy满足x+2y 已知实数xy满足 x+y-2 初三的周末练习题,x,y为实数,且x^2+y^2/2+4≤xy+2y,则x,y的值分别是还有一题，能不能顺便看一下实数x,y满足x≥y ≥1 和2x^2-xy-5x+y+4=0 则x+y= 已知实数x,y满足x^2+y^2=1 求(1-xy)(1+xy)的最大值和最小值 实数X,Y满足X大于等于Y大于等于1和2X平方-xy-5x+y+4=o,则x+y的值 已知实数x,y满足x²+y²-xy+2x-y+1=0 求x y 已知实数x,y满足2x-y≥0 x≤1 x+y+1≥0 则z=x^2-2xy+y^2已知实数x,y满足2x-y≥0 x≤1 x+y+1≥0 则z=x^2-2xy+y^2 的最大值 若实数xy满足x-y+1 若实数xy满足x-y+1≥0,x+y≥0,x≤0,则z=3“x+2y的最小值是多少 若实数xy满足x-y 1≥0,x y≥0,x≤0,则z=3“x 2y的最小值是多少 实数x、y满足x≥y≥1和2x^2-xy+5x-y+4=0,则x+y=___能写清楚就写清楚. 2000年第17届全国初中数学联赛试题实数x、y满足x≥y≥1和2x²-xy-5x+y+4=0.则x+y=? 实数x,y满足x>=y>=1和2xx-xy-5x+y+4=0,则x+y=? 如果实数x y满足x+y>=-2,x+y+xy>=-1 则y的最小值 若实数x,y满足x^2-xy-y^2 =0,则x/y=?