化简求值:(a-2)(a²-6a-9)-a(a²-2a+15)其中a= -2
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/28 11:59:22
![化简求值:(a-2)(a²-6a-9)-a(a²-2a+15)其中a= -2](/uploads/image/z/1015680-48-0.jpg?t=%E5%8C%96%E7%AE%80%E6%B1%82%E5%80%BC%EF%BC%9A%28a-2%29%28a%26%23178%3B-6a-9%29-a%28a%26%23178%3B-2a%2B15%29%E5%85%B6%E4%B8%ADa%3D+-2)
化简求值:(a-2)(a²-6a-9)-a(a²-2a+15)其中a= -2
化简求值:(a-2)(a²-6a-9)-a(a²-2a+15)其中a= -2
化简求值:(a-2)(a²-6a-9)-a(a²-2a+15)其中a= -2
原式=a³-6a²-9a-2a²+12a+18-a³+2a²-15a
=-6a²-12a+18
=-24+24+18
=18