completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part.
Consider the following.
A =
4 0
3 –2
, B =
–5 1
–6 3
Find |A|.
Find |B|.
Find AB.
Find |AB|.
Consider the following.
A =
4 0
3 –2
, B =
–5 1
–6 3
Find |A|.
Find |B|.
Find AB.
Find |AB|.
-
|A| = 4*-2 - 3*0
|A| = -8
|B| = -5*3 - 1*-6
|B| = -15+6
|B| = -9
AB =
4 0 * -5 1
3 -2 * -6 3
=
4*-5 0*-6
3*1 -2*3
AB =-20 0
3 -6
|AB| = -20*-6 - 0*3
= 120
|A| = -8
|B| = -5*3 - 1*-6
|B| = -15+6
|B| = -9
AB =
4 0 * -5 1
3 -2 * -6 3
=
4*-5 0*-6
3*1 -2*3
AB =-20 0
3 -6
|AB| = -20*-6 - 0*3
= 120