Finding the Inverse of a 3 x 3 Matrix

Summary

This video explains how to find the inverse of a 3×3 matrix using five steps.

Highlights

  • Step one: Calculate the determinant of the matrix.
  • Step two: Find the matrix of minors by removing rows and columns.
  • Step three: Form the matrix of co-factors using a sign change pattern.
  • Step four: Transpose the co-factor matrix.
  • Step five: Multiply by the reciprocal of the determinant.

Keywords

Matrix, inverse, determinant, minors, co-factors.

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes:

<a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>

Mr Mathematics Blog

Developing Mathematical Thinking Beyond Procedural Fluency

A research-backed case exploring why over-reliance on automated math homework platforms and repetitive worksheets lowers student expectations, and how departments can build genuine mathematical thinking.

Converting Between Fractions, Decimals and Percentages

How to teach converting between fractions, decimals and percentages.

From Key Skills to Deep Connections: Problem Solving in Secondary Maths

Four problem solving lessons to develop student’s mathematical reasoning and communication skills.