Question

Which expression represents the determinant of A=-36?1-6det(A) = (-3)(-6) -(1)(6)det(A) = (-3)(-6) + (1)(6)det(A) = (1)(6)-(-3)(-6)det(A) = (-3)(-6) + (-1)(-6)

Answer 1

The determinant of a 2x2 matrix is the product of the principal diagonal minus the product of the opposite diagonal, thus

det(A)=(-3)(-6)-(1)(6)