问题
填空题
已知
|
答案
已知
-1 x
=5,可以得到x-y=-5xy,1 y
则
=2x+5xy-2y x-2xy-y
=2(x-y)+5xy x-y-2xy
=-10xy+5xy -5xy-2xy
.5 7
故答案为:
.5 7
已知
|
已知
-1 x
=5,可以得到x-y=-5xy,1 y
则
=2x+5xy-2y x-2xy-y
=2(x-y)+5xy x-y-2xy
=-10xy+5xy -5xy-2xy
.5 7
故答案为:
.5 7