问题 解答题
把下列各式化成最简二次根式(a>0,b>0).
(1)
24a
+3a
2
3a
-
2a2
×
3
a
      
(2)(
2
3
18ab
-ab
2
ab
a
2
答案

(1)原式=2

6a
+3a•
6a
3a
-
2a2×
3
a

=2

6a
+
6a
-
6a

=2

6a

(2)原式=(

2
3
×3
2ab
-ab×
2ab
ab
)×
2
a

=(2

2ab
-
2ab
)×
2
a

=

2ab
×
2
a

=

2ab×
2
a

=2

b

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