问题
解答题
(1)(π-2009)0+
(2)
(3)(x-4)2=25 (4)
|
答案
(1)原式=1+2
+2-3 3
=3+
;3
(2)原式=
-27 7
+107 7
=57 7
;7
(3)x-4=±5,
∴x=9或-1;
(4)原式=
+15 3
-360 3 5
=
+25
-35 5
=0.
(1)(π-2009)0+
(2)
(3)(x-4)2=25 (4)
|
(1)原式=1+2
+2-3 3
=3+
;3
(2)原式=
-27 7
+107 7
=57 7
;7
(3)x-4=±5,
∴x=9或-1;
(4)原式=
+15 3
-360 3 5
=
+25
-35 5
=0.