Here's the question. Ive got NO clue how to do it. It's from a tutorial and I'd love to have it done so I can prepare for the tests at the end of the year.
Cheers in advanced
On of the difficulties with not showing work at all is that we do not know which of possibly many methods of solving a particular problem you are familiar with. Captain Black suggested one method and apparently that works for you. Excellent.
I might be inclined to write this as the matrix equation
and find the eigenvalues and eigenvectors of that 2 by 2 matrix.