00:01
Alright, in your question you are to write the system that is represented by this matrix.
00:06
So basically what we need to understand is the columns represent our different variable coefficients for three different equations.
00:17
So we usually go x, y, z, and looking at your answer choices, they did use the variables x, y, z.
00:23
They would be your first three columns.
00:25
Columns.
00:26
Then at this point right here, separating the last column, this is your equal sign.
00:31
And then here we have our constants, what we actually equal.
00:36
So writing the first equation, we would have 1x plus 1y plus 0z equals 4.
00:46
The next row would be 0x plus 4y plus 1z equals equals negative 5.
00:55
The last one would be 1x plus 0y minus 1z equals 8...