Hello. In the contest of my university fell the following problem: Given D (-1000 <= D <= 1000) the determinant of a 2x2 matrix, obtain the matrix that has this determinant and the 4 elements [a, b, c, d] such that a! = B! = C! = D and a, b, c, d! = 0

Any hint of how to do this without without O (n ^ 4)