问题
解答题
计算题: (1)
(2)
(3)
|
答案
(1)
+212
-375
,27
=2
+103
-93
,3
=(2+10-9)
,3
=3
;3
(2)
-(
-12 3 3
+1)(2
-1),2
=2-1-(2-1),
=1-1,
=0;
(3)2 3
+69x
-2x 4
,1 x
=2
+3x
-x 2 x
,x
=
.(5x-2) x x
计算题: (1)
(2)
(3)
|
(1)
+212
-375
,27
=2
+103
-93
,3
=(2+10-9)
,3
=3
;3
(2)
-(
-12 3 3
+1)(2
-1),2
=2-1-(2-1),
=1-1,
=0;
(3)2 3
+69x
-2x 4
,1 x
=2
+3x
-x 2 x
,x
=
.(5x-2) x x