If |A| = 2, where A is a 2 2 matrix, then |4A 1| equals

The question seems to be incomplete or incorrectly formatted. The determinant of a matrix is usually denoted as |A|, where A is a matrix. However, the notation |4A 1| is unclear. If you meant 4A, which is scalar multiplication of the matrix A by 4, then the determinant of 4A, denoted as |4A|, would be 16 times the determinant of A (since A is a 2x2 matrix), or 16*2 = 32. If you meant something else, please clarify.