Wonderful step by step explanation of the adjoint method to inverse 3x3 matrix. You transmitted your knowledge perfectly and the best evidence is I DID UNDERSTAND !!! ;-) Great video. Thank you very much !
You can choose any row or column to calculate determinant. Zero element is just a bonus for easier calculation. If there are no zero, just calculate normally
Hy Daniel! You can do the same procedure. You choise this case (zeros), cause the presence os zero (in rows or columns) simplify the calculations. it's just to make it easier.