Question

How to calculate the determinant of a 3X3 matrix in Python

Answer 1

def calculate_determinant_3x3_matrix():
    arr = [[6, 1, 1], [4, -2, 5], [2, 8, 7]]
    
    determinant = (arr[0][0] * (arr[1][1] * arr[2][2] - arr[1][2] * arr[2][1]) -
                   arr[0][1] * (arr[1][0] * arr[2][2] - arr[1][2] * arr[2][0]) +
                   arr[0][2] * (arr[1][0] * arr[2][1] - arr[1][1] * arr[2][0]))
    
    print(determinant)

calculate_determinant_3x3_matrix()


''' 
       a b c
 arr = d e f
       g h i
    
 determinant = a*(e*i - f*h) - b*(d*i-f*g) + c*(d*h - e*g)
     
''' 


'''
run:

-306

'''

 

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