\[8x² - 2x(4x + 1) \leq x\]
\[8x^{2} - 8x^{2} - 2x \leq x\]
\[- 2x - x \leq 0\]
\[- 3x \leq 0\]
\[x \geq 0\ \]
\[Ответ:x \geq 0.\]