\[2x^{2} \geq x\]
\[2x^{2} - x \geq 0\]
\[x(2x - 1) \geq 0\]
\[2x(x - 0,5) \geq 0\]
\[Ответ:\ x \in ( - \infty;0\rbrack \cup \lbrack 0,5; + \infty).\]