问题
解答题
思考:观察式子:
请化简:(1)
|
答案
(1)原式=
=7+47+4 3 (7-4
)(7+43
)3
;3
(2)原式=
=
+5 2 (
-5
)(2
+5
)2
;
+5 2 3
(3)原式=
=2+
(2
+1)2 (
-1)(2
+1)2
.2
思考:观察式子:
请化简:(1)
|
(1)原式=
=7+47+4 3 (7-4
)(7+43
)3
;3
(2)原式=
=
+5 2 (
-5
)(2
+5
)2
;
+5 2 3
(3)原式=
=2+
(2
+1)2 (
-1)(2
+1)2
.2