a²-3a-40该怎么化简?

来源：学生作业帮助网编辑：作业帮时间：2024/05/09 02:08:55

a²-3a-40该怎么化简?
a²-3a-40该怎么化简?

a²-3a-40该怎么化简?
1）a²-3a-40 2）a²-3a-40
=（a²-3a+1/4-1/4）-40 =(a-8)(a+5)
=（a-1/2）²-1/4-40
=（a-1/2）²-40.25