Linear Algebra: Coordinatization of vectors

[brinethery]

Homework Statement

I am having a really hard time trying to understand problem #10. The link has problem 10 as well as my instructor's solution on the next page.

http://www.scribd.com/doc/81881704

Homework Equations

The Attempt at a Solution

I have no idea where to start. If anyone could explain this concept in terms of matrices, I would really appreciate it.

 

[brinethery]

Okay, never mind guys! I guess staring at something long enough makes me understand it.