因式分解:a²-b²+6b-9
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/05 16:37:22
![因式分解:a²-b²+6b-9](/uploads/image/z/2983913-17-3.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%EF%BC%9Aa%26%23178%3B-b%26%23178%3B%2B6b-9)
因式分解:a²-b²+6b-9
因式分解:a²-b²+6b-9
因式分解:a²-b²+6b-9
a²-b²+6b-9
=a²-(b-3)²
=(a+b-3)(a-b+3)
a²-b²+6b-9=a²-(b-3)²=(a+b-3)(a-b+3)
a²-b²+6b-9=a²-【b²-6b+9】=a²-(b-3)²=(a+b-3)(a-b+3)
a²-b²+6b-9
=a²-(b²-6b+9)
=a²-(b-3)²
=(a+b-3)(a-b+3)
原式=a²-(b²-6b+9)=a²-(b-3)²=(a+b-3)(a-b+3)