00:01
We want to solve this system by the elimination method.
00:05
So here's what i'm going to do.
00:08
D, of course, is a differential operator with respect to t.
00:12
So what i want to do is get a single equation.
00:16
I'm going to eliminate x2.
00:19
All right.
00:19
So if i multiply this whole first equation on the left by 2 minus d.
00:29
And then on this one, i'm going to multiply by 2.
00:34
So now the x2 is canceled.
00:42
So now we get an equation for x1.
01:06
So of course this is zero.
01:33
Let's rearrange the left hand side.
01:36
Okay, so i get this equation for x1.
01:40
This operator on the left does factor.
02:10
And then we get it.
02:13
So this factor is even farther.
02:29
So it's easy to see that we have a complementary solution that's going to look like this, like that.
03:03
And then we're going to have to have a particular solution.
03:11
So x1 particular is going to be a polynomial in t of order one...