my car shakes when accelerating and gets worse when i turn left

What is your question?

every time i drive at about 40 mph my car starts shaking, it gets worse if i go around a curve turning left, and it gets worse if somebody is in the passenger side.

What makes this problem better or worse?

its worse when turning left and if i have passengers

How long has your 2006 Volvo S60 had this problem?

about a month