TeX source:
\begin{array}{rclll} 16x^2-289 &\geq & 0 &\vert & +289\\16x^2 &\geq & 289 &\vert & :16\\x^2 &\geq & \dfrac{289}{16} &\vert & \sqrt{}\\\\\vert x\vert &\geq & \dfrac{17}{4}\end{array}