Relative speed between two objects

[Husker70]

Homework Statement

Two jets of material from the center of a radio galaxy are ejected in opposite
directions. Both jets move at .750c relative to the galaxy. Determine the speed
of one jet relative to the other.

Homework Equations

u'x = ux-v/1-ux(v)/c^2

The Attempt at a Solution

u' = -.750c - .750c/1-(-.750c)(-.750)/c^2

Is this the right start?
Thanks,
Kevin

 

[borgwal]

Yes, although you might want to take the absolute value in the end to get a relative *speed*, rather than velocity.

I'm assuming here you meant to put some brackets in the right places.