d) \(\dfrac{\sqrt{5x-4}}{\sqrt{x+2}}=2\left(đk:x\ge\dfrac{4}{5}\right)\)
\(\Leftrightarrow\sqrt{5x-4}=2\sqrt{x+2}\)
\(\Leftrightarrow5x-4=4x+8\)
\(\Leftrightarrow x=12\left(tm\right)\)
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