问题
解答题
计算 (1)(-3)2-|-
(2)
(3)(
(4)
|
答案
(1)原式=9-
+1 2
-3=6;1 2
(2)原式=3
-42
+2
=0;2
(3)原式=3-2
+1-(3-2)=4-23
-1=3-23
;3
(4)原式=2
+3x
-2x
=3x
.x
计算 (1)(-3)2-|-
(2)
(3)(
(4)
|
(1)原式=9-
+1 2
-3=6;1 2
(2)原式=3
-42
+2
=0;2
(3)原式=3-2
+1-(3-2)=4-23
-1=3-23
;3
(4)原式=2
+3x
-2x
=3x
.x