Rattle/Shake? on 2006 Chevrolet Cobalt

I have this rattle/shake in my car when I am driving and breaking. I can feel it on the steering wheel and my passengers can feel it also and has mentioned something to me about getting it looked at. What can this be? Is it going to be expensive?

Could be struts or front end problem, have a tech look at it. Trying to tell you what the problem is with out looking at it is impossible