4(7x-1)^2=36

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/23 01:37:48
4(7x-1)^2=364(7x-1)^2=364(7x-1)^2=364﹙7x-1﹚²=36﹙7x-1﹚²=97x-1=±3x1=4/7x2=﹣2/7.化简7x-1=3huo7x

4(7x-1)^2=36
4(7x-1)^2=36

4(7x-1)^2=36
4﹙7x-1﹚²=36
﹙7x-1﹚²=9
7x-1=±3
x1=4/7
x2=﹣2/7.

化简 7x-1=3huo 7x-1=-3 _X=-2/7 或 x=4/7

(7x-1)^2=9
7x-1=3 或7x-1=-3
∴x=4/7 x=-2/7

收起