Question

Giúp mình vs ạ. Cảm ơn trước ạ!

Answer 1

Bài 3:

a:Ta có: \(\sqrt{4x^2-4x+1}=3\)

\(\Leftrightarrow\left|2x-1\right|=3\)

\(\Leftrightarrow\left[{}\begin{matrix}2x-1=3\\2x-1=-3\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=2\\x=-1\end{matrix}\right.\)

b: Ta có: \(2\sqrt{x-1}-4=0\)

\(\Leftrightarrow x-1=4\)

hay x=5