题目内容
计算:
(1)(
+
-3.75)×(-24);
(2)5x3-3[-x2+2(x3-
x2)].
(1)(
| 11 |
| 8 |
| 7 |
| 3 |
(2)5x3-3[-x2+2(x3-
| 1 |
| 3 |
(1)原式=-24×
-24×
+24×
=-33-56+90=1;
(2)原式=5x3+3x2-6x3+2x2=-x3+5x2.
| 11 |
| 8 |
| 7 |
| 3 |
| 15 |
| 4 |
(2)原式=5x3+3x2-6x3+2x2=-x3+5x2.
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