ĐKXĐ: \(x\ge2\)
\(\dfrac{2}{5}\sqrt{25x-50}=6\)
\(\Leftrightarrow\dfrac{2}{5}\sqrt{25\left(x-2\right)}=6\)
\(\Leftrightarrow2\sqrt{x-2}=6\Leftrightarrow\sqrt{x-2}=3\)
\(\Leftrightarrow x-2=9\Leftrightarrow x=11\left(tm\right)\)
\(ĐK:x\ge2\\ PT\Leftrightarrow\dfrac{2}{5}\cdot5\sqrt{x-2}=6\\ \Leftrightarrow2\sqrt{x-2}=6\Leftrightarrow\sqrt{x-2}=3\\ \Leftrightarrow x-2=9\\ \Leftrightarrow x=11\left(tm\right)\)
\(\dfrac{2}{5}\sqrt{25x-50}=6\)
\(\Leftrightarrow\dfrac{2}{5}\sqrt{25\left(x-2\right)}=6\)
\(\Leftrightarrow2\sqrt{x-2}=6\)
\(\Leftrightarrow\sqrt{x-2}=3\)
\(\Leftrightarrow x-2=9\)
\(\Leftrightarrow x=11\)
