Question

If y = -3 [-2 -1 4 -5 0]
[-3 12 6 -8 -2]
[1 5 -4 7 -6]
which element is y(23) ? <------(23)represents a subscript

Answer 1

\[y _{2,3}\]notates the 2nd row, 3rd column. So multiplying through by the -3 on the outside, you'd have \[-3\times6=-18\]