Solving Augmented Matrices (3 of 4: Gaussian Elimination)

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you made it so easy, more than three hours of lecture didn`t do what you did in just few minutes, thank you Mr Woo

missghani
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So why is it called the identity matrix? 6:33

mikhpesoj
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At 3:28 you said it's of row echelon form, but for row echelon form the leading non zero coefficient is supposed to be 1, row 2 and 3 has leading non zero coefficients -3 and -5 respectively. How is this a row echelon form?

agila.p
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why does the b value doesnt match the results from the previous methodology?

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