College Algebra 2e

# Key Equations

College Algebra 2eKey Equations

### Key Equations

 Identity matrix for a $2×2 2×2$ matrix $I 2 =[ 1 0 0 1 ] I 2 =[ 1 0 0 1 ]$ Identity matrix for a $3×3 3×3$ matrix $I 3 =[ 1 0 0 0 1 0 0 0 1 ] I 3 =[ 1 0 0 0 1 0 0 0 1 ]$ Multiplicative inverse of a $2×2 2×2$ matrix