Question 1202833
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Matrix B
<table border = "1" cellpadding = "5"><tr><td>1</td><td>-1</td><td>x</td></tr><tr><td>y</td><td>2</td><td>-3</td></tr></table>


Matrix {{{B^T}}} which is the transpose
<table border = "1" cellpadding = "5"><tr><td>1</td><td>y</td></tr><tr><td>-1</td><td>2</td></tr><tr><td>x</td><td>-3</td></tr></table>
This is the result of turning each row into a column.
row1 of B becomes column1 of {{{B^T}}}
row2 of B becomes column2 of {{{B^T}}}



Erase the grid lines when writing the matrices out. 
It's unfortunate math notation that matrices don't involve grid lines to separate out each item.
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