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Math Fortress
Calculus III: The Cross Product (Level 2 of 9)
This video introduces the third way of multiplying vectors called the cross product also known as the vector product and sometimes refereed to as the area product. This video will cover the component definition of the cross product. A...
Khan Academy
Khan Academy: Linear Algebra: 3 X 3 Determinant
A video lesson that shows how to find the determinant of a 3 x 3 matrix using cofactor expansion. Defines the formula in general terms then shows a concrete example. [10:01]
Khan Academy
Khan Academy: Linear Algebra: N X N Determinant
An instructional video that gives a recursive definition for the determinant of an N x N matrix based on cofactor expansion. Uses the definition to find the determinant of a concrete 4 x 4 matrix. [18:40]
Khan Academy
Khan Academy: Linear Algebra: Determinants Along Other Rows/cols
A video lesson describing how the determinants for larger matrices can be found using cofactor expansion on any row or column. Illustrates that it is helpful to choose rows or columns with zeros in order to simplify the computations....
Khan Academy
Khan Academy: Linear Algebra: Inverting Matrices (Part 2)
Video example of finding the inverse of a 3 by 3 matrix. Includes using expansion by minors to determine the determinant and finding the matrix of cofactors and adjugate or adjoint matrix. This video also appears in the strand Algebra:...
Sophia Learning
Sophia: Factored and Expanded Polynomials: Lesson 6
Throughout this lesson, the concept covered will include a polynomial being factored and two factors being multiplied to create a polynomial. It is 6 of 7 in the series titled "Factored and Expanded Polynomials."
Sophia Learning
Sophia: Factored and Expanded Polynomials: Lesson 3
Throughout this lesson, the concept covered will include a polynomial being factored and two factors being multiplied to create a polynomial. It is 3 of 7 in the series titled "Factored and Expanded Polynomials."
Sophia Learning
Sophia: Factored and Expanded Polynomials: Lesson 5
Throughout this lesson, the concept covered will include a polynomial being factored and two factors being multiplied to create a polynomial. It is 5 of 7 in the series titled "Factored and Expanded Polynomials."
Sophia Learning
Sophia: Factored and Expanded Polynomials: Lesson 1
Throughout this lesson, the concept covered will include a polynomial being factored and two factors being multiplied to create a polynomial. It is 1 of 7 in the series titled "Factored and Expanded Polynomials."
Sophia Learning
Sophia: Finding the Cofactor of a Minor: Lesson 3
This lesson goes through the steps to find the cofactor of any given minor. It is 3 of 6 in the series titled "Finding the Cofactor of a Minor."
Sophia Learning
Sophia: Finding the Cofactor of a Minor: Lesson 6
This lesson goes through the steps to find the cofactor of any given minor. It is 6 of 6 in the series titled "Finding the Cofactor of a Minor."
Sophia Learning
Sophia: Factored and Expanded Polynomials
Throughout this lesson, the concept covered will include a polynomial being factored and two factors being multiplied to create a polynomial.