Answer
$\sqrt{x_2^{2}+m_2^{2}x_2^{2}}$
Work Step by Step
To find the distance between two points $(x_1,y_1)$ and ($x_2$,$y_2$), we use the distance formula:
$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$
We find the distance from point $O(0,0)$ to $Q(x_2,m_2x_2)$:
$d(O,\ Q)=\sqrt{(x_{2}-0)^{2}+(m_{2}x_{2}-0)^{2}}$
$=\sqrt{x_2^{2}+m_2^{2}x_2^{2}}$
