问题
解答题
计算下列各小题: (1)|-5|-
(2)(4ab3+6a3b-8a3b2)÷2ab-(a+b)(3a+2b) |
答案
(1)原式=5-4+3-1
=3;
(2)原式=2b2+3a2-4a2b-(3a2+2ab+3ab+2b2)
=2b2+3a2-4a2b-3a2-2ab-3ab-2b2
=-4a2b-5ab.
计算下列各小题: (1)|-5|-
(2)(4ab3+6a3b-8a3b2)÷2ab-(a+b)(3a+2b) |
(1)原式=5-4+3-1
=3;
(2)原式=2b2+3a2-4a2b-(3a2+2ab+3ab+2b2)
=2b2+3a2-4a2b-3a2-2ab-3ab-2b2
=-4a2b-5ab.