How do you find the determinant of #|(13,7), (-5,-8)|#? Precalculus Matrix Algebra Determinant of a Square Matrix 1 Answer Steve M Dec 3, 2016 #|(13,7), (-5,-8)|= -69 # Explanation: # det ( (13,7), (-5,-8) ) = |(13,7), (-5,-8)| # #= (13)(-8) - (-5)(7) # #= -104 + 35 # #= -69 # Answer link Related questions What is the determinant of an inverse matrix? What is the determinant of a matrix used for? What is the determinant of a matrix to a power? What is meant by the determinant of a matrix? How do I find the determinant of a #2xx2# matrix? How do I find the determinant of a #3xx3# matrix? How do I find the determinant of of a #4xx4# matrix? How do I find the determinant of of a #5xx5# matrix? Does every matrix have a determinant? What is the cofactor expansion method to finding the determinant? See all questions in Determinant of a Square Matrix Impact of this question 2281 views around the world You can reuse this answer Creative Commons License