化简:a2+3aa2+3a+2÷a+3/a+1+2/a+2.

问题描述:

化简:

a2+3a
a2+3a+2
÷
a+3
a+1
+
2
a+2

a2+3a
a2+3a+2
÷
a+3
a+1
+
2
a+2
=
a(a+3)
(a+1)(a+2)
×
a+1
a+3
+
2
a+2

=
a
a+2
+
2
a+2

=1,
故答案为1.