问题
解答题
化简求值:
|
答案
÷(a-a-b a
)2ab-b2 a
=
÷(a-b a
-a2 a
)2ab-b2 a
=
÷a-b a a2-2ab+b2 a
=
×a-b a a a2-2ab+b2
=
×a-b a a (a-b)2
=
.1 a-b
当a=2010,b=2009时,原式=
=1.1 2010-2009
化简求值:
|
÷(a-a-b a
)2ab-b2 a
=
÷(a-b a
-a2 a
)2ab-b2 a
=
÷a-b a a2-2ab+b2 a
=
×a-b a a a2-2ab+b2
=
×a-b a a (a-b)2
=
.1 a-b
当a=2010,b=2009时,原式=
=1.1 2010-2009