问题 解答题
计算:
(1)(
11
8
+
7
3
-3.75)×(-24)

(2)5x3-3[-x2+2(x3-
1
3
x2)]
答案

(1)原式=-24×

11
8
-24×
7
3
+24×
15
4
=-33-56+90=1;

(2)原式=5x3+3x2-6x3+2x2=-x3+5x2

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