问题
填空题
若|2x+y+1|+(x-y+2)2=0,则(xy-y)2y+x=______.
答案
∵|2x+y+1|+(x-y+2)2=0,
∴
,2x+y+1=0 x-y+2=0
解得:
,x=-1 y=1
∴(xy•y)2y+x=-1.
故答案为:-1.
若|2x+y+1|+(x-y+2)2=0,则(xy-y)2y+x=______.
∵|2x+y+1|+(x-y+2)2=0,
∴
,2x+y+1=0 x-y+2=0
解得:
,x=-1 y=1
∴(xy•y)2y+x=-1.
故答案为:-1.