Evaluate the determinant of the given matrix by reducing the matrix to row-echelon form. 1 -20 +# A = -2 2 7 2 -5 6
Evaluate the determinant of the given matrix by reducing the matrix to row-echelon form. 1 -20 +# A = -2 2 7 2 -5 6
Chapter4: Systems Of Linear Equations
Section4.6: Solve Systems Of Equations Using Determinants
Problem 4.96TI: Evaluate the determinant |213122440| by expanding by minors.
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The answer is apparently -5, but when I reduced it to row echelon form I got 10.
Also, am I only supposed to make the lower triangualr numbers zero when reducing to row echelon form?
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