Question

[Nguyễn Văn Chương]

7.(x-1/2)^2=9

HELP ME PLS

Answer 1

[Ngô Hải Nam]

`7(x-1/2)^2=9`

`(x-1/2)^2=9/7`

\(=>\left[{}\begin{matrix}x-\dfrac{1}{2}=\sqrt{\dfrac{9}{7}}\\x-\dfrac{1}{2}=-\sqrt{\dfrac{9}{7}}\end{matrix}\right.\\ < =>\left[{}\begin{matrix}x=\dfrac{3}{\sqrt{7}}+\dfrac{1}{2}\\x=-\dfrac{3}{\sqrt{7}}+\dfrac{1}{2}\end{matrix}\right.\\ < =>\left[{}\begin{matrix}x=\dfrac{6+\sqrt{7}}{2\sqrt{7}}\\x=\dfrac{-6+\sqrt{7}}{2\sqrt{7}}\end{matrix}\right.\)

Answer 2

[Ẩn danh :)))]

7.(x-\(\dfrac{1}{2}\))²=9

7.x+\(\dfrac{1}{4}\) =9

7.x=\(\dfrac{37}{4}\)

x=\(\dfrac{37}{28}\)