ĐKXĐ: \(x\ge\frac{8}{3}\)
\(\Leftrightarrow\sqrt{7x+1}\le\sqrt{3x-8}+\sqrt{2x+7}\)
\(\Leftrightarrow7x+1\le5x-1+2\sqrt{6x^2+5x-56}\)
\(\Leftrightarrow x+1\le\sqrt{6x^2+5x-56}\)
\(\Leftrightarrow x^2+2x+1\le6x^2+5x-56\)
\(\Leftrightarrow5x^2+3x-57\ge0\)
Nghiệm xấu quá \(x\ge\frac{-3+\sqrt{1149}}{10}\)