问题 解答题
计算
(1)(-2)3+|1-
2
|-
38
+
3103

(2)(3x-2)(2x+3)-(x-1)2
答案

(1)(-2)3+|1-

2
|-
38
+
3103

=-8+

2
-1-2+10

=

2
-1;

(2)(3x-2)(2x+3)-(x-1)2

=6x2+9x-4x-6-(x2-2x+1)

=6x2+5x-6-x2+2x-1

=5x2+7x-7.

判断题
问答题