00:01
Okay, we want to find a squared and then a cubed.
00:03
So to do this, we just simply do a times a.
00:07
And we do a matrix multiplication.
00:10
Since we do it a 2x2 by 2 by 2 by 2, we're going to end up with a 2 by 2 by 2.
00:14
And let's say we want to find first row, first column.
00:18
You'd have to do the first row of the first matrix by the first column and the second matrix.
00:22
Equally, if we wanted to find the second row of the second column, you have to do the second row of the first matrix by the second column of the second matrix.
00:29
So let's do that here.
00:30
First row, first column here, you've got 2 times 2, which is 4, minus 1 times 1, minus 1, give us 3.
00:37
So we're left with the 3 here.
00:39
Next up, we're going for our stick with our first row, go to our second column, you're just going to have 2 lots of minus 1 there, minus 2.
00:46
Okay, second row, first column, just one lot of 2 there.
00:50
We're also just going to have, i think you can see 1 minus 1 there...