MATRICES AND DETERMINANTS Higher Concepts of Mathematics Solution: 2 3 1 10 2 2 1 1 2 x = 2 3 1 1 2 2 3 1 2 2 2 1 1 10 2 3 1 2 y = 2 3 1 1 2 2 3 1 2 2 3 2 1 2 10 3 1 1 z = 2 3 1 1 2 2 3 1 2 Expanding the top matrix for x using the elements in the bottom row gives: 1 3 1 2 2 (   1) 2 1 10 2 (   2) 2 3 10 2 1 (6 2) (   1)  (4 10) (   2)  (   4 30) 4 6 52 42 MA-05 Page 28 Rev. 0