A 2 by 2 matrix with a, b, c and d as the elements of the matrix has its determinant to be the result: ad – bc.
Generally, the determinant of A can be represented as det(A) or |A|.
At the end of this lesson, the student should be able to
i.) Identify a 2 by 2 matrix
ii.) Find the determinant of a 2 by 2 matrix
ii.) Use the determinant to find the inverse of a 2 by 2 matrix
iii.) Verify that the product of matrix A and its inverse is a unit matrix