What is the determinant of this matrix: \left[\begin{array}{ccc}0&8\\7&0\end{array}\right]

Question

What is the determinant of this matrix:


`\left[\begin{array}{ccc}0&8\\7&0\end{array}\right]`

Answer 1

`\\ \rm\Rrightarrow \left|\begin{array}{ccc}0 &8 \\ 7& 0\end{array}\right|`

`\\ \rm\Rrightarrow 0-8(7)`

`\\ \rm\Rrightarrow 0-56`

`\\ \rm\Rrightarrow -56`

Answer 2

-56

Explanation:

Formula to get determinant is::

`\left[\begin{array}{ccc}a&b\\c&d\end{array}\right] = ad-bc`

0(0)-8(7)

0 - 56

-56