## Archive for the ‘7. Linear Algebra’ Category

### Ex 1: Solve a System of Two Equations Using a Matrix Equation

This video explains how to solve a system of two linear equations with two unknowns using a matrix equation.

### Ex 2: Solve a System of Two Equations Using a Matrix Equation

This video explains how to solve a system of two linear equations with two unknowns using a matrix equation.

### Ex: Solve a System of Three Equations Using a Matrix Equation

This video explains how to solve a system of three linear equations with three unknowns using a matrix equation.

### Ex 2: Inverse of a 3×3 Matrix Using an Augmented Matrix

This video explains how to find the inverse of a 3×3 matrix using an augmented matrix.

### Ex 1: Inverse of a 3×3 Matrix Using an Augmented Matrix

This video explains how to find the inverse of a 3×3 matrix using an augmented matrix.

### Ex: Inverse of a 2×2 Matrix Using an Augmented Matrix

This video explains how to find the inverse of a 2×2 matrix using an augmented matrix.

### Ex: Solve a Linear Inequality in One Variable Graphically using the TI84

This video explains how to solve a linear inequality in one variable by graphing using the TI84.  The intersection method is used.

### Ex: Find the Inverse of a 2×2 Matrix Using a Formula

This video explains how to find the inverse of a 2×2 matrix using the inverse formula.

### Ex: Solve a System of Three Equations Using Cramer’s Rule

This video explains how to use Cramer’s Rule to solve a system of three linear equations with three unknowns.

### Ex: Solve a System of Two Equations Using Cramer’s Rule

This video explains how to use Cramer’s Rule to solve a system of two linear equations with two unknowns.