In this lesson on Determinants, you will learn the basics of a determinant such as the requirement of square matrices and using vertical bars to differentiate them from standard matrices. You will then move onto finding the second order determinant of a 2x2 matrix before moving into finding the third order determinant of a 3x3 matrix. For a 3x3 matrix you first learn the technique called expansion by minors before moving into the diagonal method. Four examples at the end test your new found knowledge.
A determinant is a value associated with a square matrix.
Third-order determinants can be evaluated by expanding by minors along any row or column of the associated matrix.
These determinants can also be found by calculating products of entries along the diagonals and then adding and subtracting these products.
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.