作业帮5a²+[a²+(5a²-3a²)-6(a²-a)],其中a=负二分之一,
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/03 09:21:03
![5a²+[a²+(5a²-3a²)-6(a²-a)],其中a=负二分之一,](/uploads/image/z/445170-66-0.jpg?t=5a%26%23178%3B%2B%5Ba%26%23178%3B%2B%285a%26%23178%3B-3a%26%23178%3B%29-6%28a%26%23178%3B-a%29%5D%2C%E5%85%B6%E4%B8%ADa%3D%E8%B4%9F%E4%BA%8C%E5%88%86%E4%B9%8B%E4%B8%80%2C)
5a²+[a²+(5a²-3a²)-6(a²-a)],其中a=负二分之一,
5a²+[a²+(5a²-3a²)-6(a²-a)],其中a=负二分之一,
5a²+[a²+(5a²-3a²)-6(a²-a)],其中a=负二分之一,
5a²+[a²+(5a²-3a²)-6(a²-a)],
=5a²+(a²+2a²-6a²+6a)
=5a²+a²+2a²-6a²+6a
=2a²+6a
=2*1/4+6*(-1/4)
=1/2-3/2
=-1