问题
解答题
化简求值:
|
答案
原式=
÷(a+2)2 a+1 (a+2)(a-2) a+1
=
×(a+2)2 a+1 a+1 (a+2)(a-2)
=
,a+2 a-2
当a=3时,原式=
=5.3+2 3-2
化简求值:
|
原式=
÷(a+2)2 a+1 (a+2)(a-2) a+1
=
×(a+2)2 a+1 a+1 (a+2)(a-2)
=
,a+2 a-2
当a=3时,原式=
=5.3+2 3-2