作业帮x/x方-9-1/x方+6x+91.x/x方-9-1/x方+6x+9 2.1/2+a-1/a方-4 3.1/x+3-6/x方-9-1/3-x 4.a方/a-1-a-1
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 11:32:59
x/x方-9-1/x方+6x+91.x/x方-9-1/x方+6x+9 2.1/2+a-1/a方-4 3.1/x+3-6/x方-9-1/3-x 4.a方/a-1-a-1
x/x方-9-1/x方+6x+9
1.x/x方-9-1/x方+6x+9
2.1/2+a-1/a方-4
3.1/x+3-6/x方-9-1/3-x
4.a方/a-1-a-1
x/x方-9-1/x方+6x+91.x/x方-9-1/x方+6x+9 2.1/2+a-1/a方-4 3.1/x+3-6/x方-9-1/3-x 4.a方/a-1-a-1
x^2-9=(x^2-6x+9)/2
2(x^2-9)=(x^2-6x+9)
2(x-3)(x+3)-(x^2-6x+9)=0
2(x-3)(x+3)-(x-3)^2=0
(x-3)[2(x+3)-(x-3)]=0
(x-3)(2x+6-x+3)=0
(x-3)(x+9)=0
x=-3或x=-9