Question

Tìm x biết: 3,2 - 5\(\sqrt{x}\) = \(\frac{1}{5}\)

Answer 1

\(3,2-5\sqrt{x}=\frac{1}{5}\)

\(\Leftrightarrow5\sqrt{x}=3,2-\frac{1}{5}\)

\(\Leftrightarrow5\sqrt{x}=3\)

\(\Leftrightarrow\sqrt{x}=\frac{3}{5}\)

\(\Leftrightarrow x=\frac{9}{25}\)

Answer 2

3,2 - 5\(\sqrt{x}\) = \(\frac{1}{5}\)

-5\(\sqrt{x}\) = \(\frac{1}{5}\) - 3,2

-5\(\sqrt{x}\) = -3

\(\sqrt{x}\) = \(\frac{-3}{-5}\) = \(\frac{3}{5}\)

\(\Rightarrow\) \(x\) = (\(\frac{3}{5}\))²

\(x\) = \(\frac{9}{25}\)