Lesson: Three-by-Three Determinants | Nagwa Lesson: Three-by-Three Determinants | Nagwa

Lesson: Three-by-Three Determinants Mathematics • First Year of Secondary School

Join Nagwa Classes

Attend live Mathematics sessions on Nagwa Classes to learn more about this topic from an expert teacher!

Check Available Classes
Mathematics
  • Next Session:
Try This

In this lesson, we will learn how to evaluate 3 × 3 determinants using the cofactor expansion (the Laplace expansion) or the rule of Sarrus.

Lesson Plan

Students will be able to

  • define minors and cofactors in a matrix,
  • use the cofactors method (Laplace expansion) to evaluate a 3×3 determinant,
  • use the Sarrus method to evaluate a 3×3 determinant.

Lesson Presentation

Lesson Video

Video Thumbnail
15:14

Lesson Explainer

Lesson Playlist

Join Nagwa Classes

Attend live sessions on Nagwa Classes to boost your learning with guidance and advice from an expert teacher!

  • Interactive Sessions
  • Chat & Messaging
  • Realistic Exam Questions
View All Classes
nagwa classes qrcode

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy