Tìm x =))) ( 2x - 1)² - 25 = 0

`(2x-1)^2-25=0`

`⇒(2x-1)^2-5^2=0`

`⇒(2x-1-5)(2x-1+5)=0`

`⇒(2x-6)(2x+4)=0`

`⇒`\(\left[ \begin{array}{l}2x-6=0\\2x+4=0\end{array} \right.\) 

`⇒`\(\left[ \begin{array}{l}2x=6\\2x=-4\end{array} \right.\) 

`⇒`\(\left[ \begin{array}{l}x=3\\x=-2\end{array} \right.\)