Question

Answer 1

Ta có: \(2\sqrt{x}-1=\sqrt{4}\)

\(\Leftrightarrow2\sqrt{x}=3\)

\(\Leftrightarrow\sqrt{x}=\dfrac{3}{2}\)

hay \(x=\dfrac{9}{4}\)

Answer 2

\(2\sqrt{x}-1=\sqrt{4}\\ \Rightarrow2\sqrt{x}-1=2\\ \Rightarrow2\sqrt{x}=3\\ \Rightarrow\sqrt{x}=\dfrac{3}{2}\\ \Rightarrow x=\dfrac{9}{4}\)

Vậy x = 9/4