Linear Algebra: Ch 2 - Determinants (30 of 48) Rule of Addition: 2x2 Determinants

In this video I will demonstrate |A+B| does not = |A|+|B|, A and B are 2x2 matrices.

Next video in this series can be seen at:

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What is the name of this property of determinants ?
R1= R1 + R2 + R3
C3= C1 + C3
R3= R3 - R2