Determinant of a 3x3 matrix

makeMatrix(randRange(-2, 5, DIM, DIM)) matrixDet(MAT) "\\textbf " + randFromArray("ABCDEF")

PRETTY_MAT_ID = printSimpleMatrix(MAT)

What is the determinant of PRETTY_MAT_ID?

SOLN

3 makeMatrix([["a","b","c"],["d","e","f"],["g","h","i"]])

The determinant of any 3x3 matrix can be computed the following way:

printSimpleMatrixDet(HINT_MAT) = matrix3x3DetHint(HINT_MAT, true)

= matrix3x3DetHint(HINT_MAT)

In this specific case,

printSimpleMatrixDet(MAT) = matrix3x3DetHint(MAT, true)

= matrix3x3DetHint(MAT)


                        = SOLN