đề sai nên mk sửa lại chút nhé :vv
đkxđ: x >=1
\(\sqrt{25x-25}-\sqrt{4x-4}-\sqrt{x-1}=0\)
\(\Leftrightarrow\sqrt{25\left(x-1\right)}-\sqrt{4\left(x-1\right)}-\sqrt{x-1}=0\)
\(\Leftrightarrow5\sqrt{x-1}-2\sqrt{x-1}-\sqrt{x-1}=0\)
\(\Leftrightarrow2\sqrt{x-1}=0\Leftrightarrow\sqrt{x-1}=0\Leftrightarrow x-1=0\Leftrightarrow x=1\left(TM\right)\)
Vậy x = 1