( )(5a+1)=1-25a²

来源：学生作业帮助网编辑：六六作业网时间：2024/05/22 14:17:39

()(5a+1)=1-25a²()(5a+1)=1-25a²()(5a+1)=1-25a²(1-5a)(1+5a)=1-25a²5a+1=1-25a²

( )(5a+1)=1-25a²
( )(5a+1)=1-25a²

( )(5a+1)=1-25a²
(1-5a)(1+5a)=1-25a²

5a+1=1-25a²
25a²+5a=0
5a（5a+1）=0
5a=0
a=0
5a+1=0
5a=-1
a=-1/5
∴a=0、-1/5