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# Matrix Inverse problems in Linear Algebra

## 2×2 Matrix Inverse using Determinant example

A =

D =

B =

Find Inverses of all these 3 matrices, A-1, D-1, B-1, by using their respective determinants.

Solution to this Linear Algebra practice problem is given in the video below!

## Matrix Inverse using Identity Matrix example problem

Find the Inverse, if it exists, of the following square matrices by using their Identity Matrix.

Solution to these Linear Algebra Identity Matrix Inverse practice problems is given in the video below!

## System Solution using Matrix Inverse example question

Find the solution to the following system of linear equations by using the product of the Inverse of a coefficient matrix and augmented matrix column.

3x1 + 5x2 = 2

x1 + 2x2 = 3

Solution to this Linear Algebra Matrix Inverse practice problem is given in the video below!

## Find Linear Equation using Matrix Inverse example

Use Matrix Inverse to find an Equation of a Line y = mx + b

when

Solution to this Matrix Inverse Linear Equation practice problem is given in the video below!

## Find Quadratic Equation using Matrix Inverse example question

Use Matrix Inverse to find a Quadratic Equation of a Curve y = ax2 + bx + c

when

Solution to this Matrix Inverse Quadratic Equation practice problem is given in the video below!

## Minors and Cofactors example problem

Find the minors and cofactors of the following matrix.

Solution to this Linear Algebra practice problem is given in the video below!

## Matrix Determinant with Arrow Technique example

Find the determinant of the following 3 x 3 matrix by using the Arrow Technique.

Solution to this Linear Algebra practice problem is given in the video below!

## System Solution using Cramer’s Rule example question

Find the solution to the following system of linear equations by using Cramer’s Rule.

7x1  2x2 = 3

3x1 + x2 = 5

Solution to this Linear Algebra practice problem is given in the video below!

## Matrix Inverse using Adjoint Method example problem

Find the Inverse of the following Matrix by using the Adjoint Method.

Solution to this Linear Algebra practice problem is given in the video below!