题目内容
计算
(1)(-2)3+(-1)2013-(
)0
(2)(3a+5b)(-3a-8b)
(1)(-2)3+(-1)2013-(
| 3 |
| 5 |
(2)(3a+5b)(-3a-8b)
(1)(-2)3+(-1)2013-(
)0
=-8-1-1
=-10;
(2)(3a+5b)(-3a-8b)
=-9a2-24ab-15ab-40b2
=-9a2-39ab-40b2.
| 3 |
| 5 |
=-8-1-1
=-10;
(2)(3a+5b)(-3a-8b)
=-9a2-24ab-15ab-40b2
=-9a2-39ab-40b2.
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