Co- factor is very important in the topics of matrix and determinant because , with this , we can calculate adjoint and inverse of matrix . So , understand the definition of co-factor
Definition of Co-factor
Co-factor is just multiplication of (- 1)'s power m+n ( m is the order of row in set of row and n is the order of column in the set of column ) with minor of that matrix .
we can explain it with the following example