00:01
So we're giving the following system of equations.
00:04
We'll start by putting them into a matrix.
00:07
So we have 2 .2 .7.
00:11
Negative 1.
00:12
2 .1.
00:14
2 .4, 6, 1, 15.
00:19
So this is our starting matrix.
00:23
So we're going to keep our first row of 2, 2, 7, negative 1.
00:29
We're going to multiply the first row by negative 1 and add it to our starting matrix.
00:32
Second row.
00:34
So this will give us 0, negative 1, negative 5, 3.
00:40
And now we will multiply our first row by negative 2 and add it to the third row.
00:45
This will give us 0, 2, negative 13, and 17.
00:55
So now we will continue with our row operations.
00:58
This time we're going to keep our second row of negative 1, negative 5, 3...