Can someone explain why or how this equation was formed? I

If we set these two equations equal to each other we can derive the results shown below. m v? = { KT which then yields, Vrms 3 KT m Question: This term Vrms is called the root-mean-square of the velocity. Briefly explain what the term rms represents about the motion of the molecules? Why is an ims value used instead of a more traditional average term to study the motion