问题
解答题
(1)计算:-22+(-3)2+sin30°+|1-
(2)计算:
|
答案
(1)原式=-4+9+
+1 2
-1+1,3
=5
+1 2
;3
(2)原式=
+4 a+2 a-2 1
=
+4 a+2
,a2-4 a+2
=
.a2 a+2
(1)计算:-22+(-3)2+sin30°+|1-
(2)计算:
|
(1)原式=-4+9+
+1 2
-1+1,3
=5
+1 2
;3
(2)原式=
+4 a+2 a-2 1
=
+4 a+2
,a2-4 a+2
=
.a2 a+2