问题
解答题
化简: (1)(2
(2)9
(3)|1-
|
答案
(1)原式=(2
+5
+215
-5
)(215
+5
-215
+5
)15
=4
×25 15
=40
;3
(2)原式=9
-712+203 3
=29
-712;3
(3)原式=
-1+2
-3
+2-2 3
=1.
化简: (1)(2
(2)9
(3)|1-
|
(1)原式=(2
+5
+215
-5
)(215
+5
-215
+5
)15
=4
×25 15
=40
;3
(2)原式=9
-712+203 3
=29
-712;3
(3)原式=
-1+2
-3
+2-2 3
=1.