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> 先化简,再求值:6m2-9÷2m-3-mm+3,其中m=2.-数学
先化简,再求值:6m2-9÷2m-3-mm+3,其中m=2.-数学
题目简介
先化简,再求值:6m2-9÷2m-3-mm+3,其中m=2.-数学
题目详情
先化简,再求值:
6
m
2
-9
÷
2
m-3
-
m
m+3
,其中m=2.
题型:解答题
难度:中档
来源:株洲
答案
原式=
class="stub"6
(m+3)(m-3)
•
class="stub"m-3
2
-
class="stub"m
m+3
=
class="stub"6
m+3
-
class="stub"m
m+3
=
class="stub"6-m
m+3
,
把m=2代入可得,原式=
class="stub"4
5
.
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题目简介
先化简,再求值:6m2-9÷2m-3-mm+3,其中m=2.-数学
题目详情
答案
=
=
把m=2代入可得,原式=