00:01
This problem we've been given two matrices.
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The first is 2, root 7, 3, root 28, negative 6.
00:11
And from this, we want to subtract off negative 1, 5 root 7, 2 root 7.
00:23
Now, in order to subtract matrices, it is just all about combining like terms.
00:27
And so that's what we're going to do here.
00:28
We're just going to combine our like terms.
00:31
Now, before we do that, though, notice 3 root 28, root 28 can be broken down.
00:35
It comes 2 root 7, and then you multiply it by...