00:01
So we want to solve this pair of equations.
00:04
So one thing i noticed right away is that y doesn't appear without a derivative.
00:10
So if i subtract them, i'll eliminate y completely.
00:17
So equation one minus equation two gives us this.
00:29
I can solve that easily for x.
00:31
The complementary solution is e to the three t, and then the particular solution is gonna have something times e to the t.
00:39
We'll substitute that in, take the derivative, substitute it all in the equation.
01:00
The e to the three t terms cancel out, and i can solve for c two is five halves.
01:11
So that tells me x looks like this.
01:17
So c one's an arbitrary constant, and i don't have initial conditions to be able to figure out what that is...