How do you find the determinant of ((1, 2), (1, 3))? Precalculus Matrix Algebra Determinant of a Square Matrix 1 Answer Steve M Oct 31, 2016 |(1,2),(1,3)| = 1 Explanation: If we have a matrix A = ((a,b),(c,d)), then the determinant of A denoted det(A) or |A| is calculated as: |A| = det(A) = a * d - b*c :. |(1,2),(1,3)| = (1)(3) - (2)(1) :. |(1,2),(1,3)| = 3 - 2 :. |(1,2),(1,3)| = 1 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 1877 views around the world You can reuse this answer Creative Commons License