# Fastest way to find inverse of 4x4 matrix?

pyroknife
What is the fastest way to find the inverse of a 4x4 matrix?

The only way I know is to set up the matrix with the 4x4 matrix and the identity matrix and row reduce. But that takes forever sometimes.

Homework Helper
Gold Member
What is the fastest way to find the inverse of a 4x4 matrix?

The only way I know is to set up the matrix with the 4x4 matrix and the identity matrix and row reduce. But that takes forever sometimes.

It is often (but not always) faster to use the determinant and the adjugate matrix.