计算 (1)(2+3)(2-5); (2)2(1+23)+(-2)2-(1-3)0-24.
问题描述:
计算
(1)(
+3)(
2
-5);
2
(2)
(1+2
2
)+(-2)2-(1-
3
)0-
3
.
24
答
(1)原式=2-5
+3
2
-15
2
=-13-2
;
2
(2)原式=
+2
2
+4-1-2
6
6
=
+3.
2