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  1. fbeltrao

    Very simple matrix, very wrong answer

    Try to find the determinant of the following 3x3 matrix: | 2 3 4 | M := | 1 -2 3 | | 3 1 7 | MathCAD 15 returns me this: |M| = 6.217*10^-15 Which is obviously wrong. The answer is ZERO. Doing it manually: [2*(-2)*7 + 3*3*3 + 1*1*4] - [4*(-2)*3 + 3*1*7 + 3*1*2] 3 - 3 0 Also...

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