无主之地火龙位置:(x-y)^-4(x-y-1)
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分解因式,速度给出后半解题思路过程的追加奖励
(x-y)^-4(x-y-1)
=(x-y)^2-4(x-y)+4
=(x-y-2)^2
因式分解(x-y)(x-y)-4(x-y-1)
(x-y)^-4(x-y-1)
(x+y)2-4(x+y-1)
1/4(x+y)+1/2(x+y)*(x+y)>=x*根号y+y*根号x
已知X+Y=-4,求1/2(X+Y)+4(X-Y)-3(X-Y)-3/2(X+Y)-X+Y
(x-y)4*(y-x)3=(y-x)7 ()
因式分解:(x+y)(x+y)+4(x-y)(x-y)-4(x·x-y·y)
x,y,x,y,x,y,x,y,x,y,x,y,x,y,x,y,x,y,
求1/4(x+y)+1/2(x+y)*(x+y)的最值
如果x和y互为倒数.求:(1).x*x*x+2y*y*x*x+x*y*y*y (2).x*x*x-x*y+y*y*y (要有过程)