Answer
$\sqrt {x_2^2+m_2^2x_2^2}$
Work Step by Step
Given $O(0,0)$ and $Q(x_2,m_2x_2)$, we have $d(O,Q)=\sqrt {(x_2-0)^2+(m_2x_2-0)^2}=\sqrt {x_2^2+m_2^2x_2^2}$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.