Question

For \[\begin{vmatrix}1&-2\\4&3\end{vmatrix}\], what is \(M_{21}\)?

Options

• \(2\)

• \(-2\)

• \(1\)

• \(4\)

Answer 1

For \(M_{21}\), delete the second row and first column. The remaining entry is \(-2\), hence \(M_{21}=-2\).