What is the name of this mathematical formula?

[RaeMathematics]

I have seen this multiple times and I know its calculation methods are p x s - q x r, but is there an actual name for it? Thanks.

 

[Deleted member 4993]

View attachment 28038 I have seen this multiple times and I know its calculation methods are p x s - q x r, but is there an actual name for it? Thanks.

The name is Determinant of a matrix.

 

[RaeMathematics]

Thank you!