化简:a2+3aa2+3a+2÷a+3a+1+2a+2.-数学

题目简介

化简:a2+3aa2+3a+2÷a+3a+1+2a+2.-数学

题目详情

化简:
a2+3a
a2+3a+2
÷
a+3
a+1
+
2
a+2
题型:解答题难度:中档来源:不详

答案

a2+3a
a2+3a+2
÷class="stub"a+3
a+1
+class="stub"2
a+2
=
a(a+3)
(a+1)(a+2)
×class="stub"a+1
a+3
+class="stub"2
a+2

=class="stub"a
a+2
+class="stub"2
a+2

=1,
故答案为1.

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