问题
解答题
解方程. x-
x+
|
答案
(1)x-
+1 3
=2 5
,5 9
x-
+1 3
+2 5
=1 3
+5 9
,1 3
x+
=2 5
,8 9
x+
-2 5
=2 5
-8 9
,2 5
x=
;22 45
(2)x+
=1 4
,8 25
x+
-1 4
=1 4
-8 25
,1 4
x=
.7 100
解方程. x-
x+
|
(1)x-
+1 3
=2 5
,5 9
x-
+1 3
+2 5
=1 3
+5 9
,1 3
x+
=2 5
,8 9
x+
-2 5
=2 5
-8 9
,2 5
x=
;22 45
(2)x+
=1 4
,8 25
x+
-1 4
=1 4
-8 25
,1 4
x=
.7 100