6. If A = find | A |

6. If

, find | A |

	1	1	-2
=	2	1	-3
	5	4	-9
=	1	1	-3	-	(1)	2	-3	+	-2	2	1
		4	-9			5	-9			5	4
=	1(1 x -9 - (4 x -3))				-(1)(2 x -9 - (5 x -3))				-2(2 x 4 - (5 x 1))
=	3	+	3	+	-6
=	0