Question

What is the determinant of m= {5 8 -5 4} ? 20 40 60 80

Answer 1

c. 60

Step-by-step explanation

math

Answer 2

60

Explanation:

We have been given the matrix;

`\left[\begin{array}{ccc}5&8\\-5&4\end{array}\right]`

For a 2-by-2 matrix, the determinant is calculated as;

( product of elements in the leading diagonal) - (product of elements in the other diagonal)

determinant = ( 5*4) - (8*-5)

= 20 - (-40) = 60