Khan Academy: More Determinant Depth: Determinant as Scaling Factor

Develop an understanding of the scale of similarity. Starting with the concept of congruency, the resource introduces the idea of similarity between two figures. As part of a larger playlist on geometry, it defines similarity and uses...

Use division and factoring to determine the leading 1 coefficient. This presentation thoroughly explains how to factor a trinomial in order to determine its common factors.

A video lesson explaining the determinant rule for the very special case when three matrices are identical except for one row, and that row of the third matrix is the sum of those rows in the other two matrices.

A video lesson proving that the determinant of an upper triangular matrix is the product of the all of the entries along the main diagonal

Correction of last video showing that the determinant when one row is multiplied by a scalar is equal to the scalar times the determinant

A video showing what happens to the determinant when we perform a row operation.

This video, shows how to calculate a 4x4 determinant by putting in in upper triangular form first.

A video lesson proving that if a matrix has duplicate rows then its determinant will be 0.

Sal dives in even deeper with a few more examples of exponential decay. Practice calculating k from half-life, and calculating initial mass. [7:21]

Video demonstrates how to factor a trinomial with a leading coefficient of 8 and GCF of 8. Factor by grouping method is used to factor the trinomial. Practice problems available. [5:01]