# Matrices and Linear Systems

1. Mar 5, 2012

### Totalderiv

1. The problem statement, all variables and given/known data
Write the given system in the form $$x'=P(t)x + f(t)$$

$$x'=-3y , y'=3x$$

2. Relevant equations
$$x'=P(t)x + f(t)$$
$$x(t)=c_1x_1(t)+c_2x_2(t)+...+c_nx_n(t)$$

3. The attempt at a solution
I have no idea how to start this since my teacher never covered this in our notes and the book doesn't give an example of this type of problem. Please help!

2. Mar 8, 2012

Any one?