问题
解答题
已知x=2009+
|
答案
÷（x-x-y x
）2xy-y2 x
=
÷（x-y x
-x2 x
）2xy-y2 x
=
÷x-y x x2-2xy+y2 x
=
•x-y x x (x-y)2
=
，1 x-y
当x=2009+
，y=2010时，原式=2
=1 2009+
-20102
=1
-12
+1．2
搜题请搜索小程序“爱下问搜题”
已知x=2009+
|
÷（x-x-y x
）2xy-y2 x
=
÷（x-y x
-x2 x
）2xy-y2 x
=
÷x-y x x2-2xy+y2 x
=
•x-y x x (x-y)2
=
，1 x-y
当x=2009+
，y=2010时，原式=2
=1 2009+
-20102
=1
-12
+1．2