|0 3| B= |-2 4|
|2 -5| |0 -1|
A . B =
(0 * -2, + 3 * 0) = c11 = 0
(0 * 4 + 3 * 1) = c12 = 3
(2 * -2 + -5 * 0) = c21 = -4 + 0 = -4
(2 * 4 + -5 * -1) = c22 = 8 + -5 = 3
C =
I0 3I
I-4 3I
C- A.B =
I0 3I menos I0 3I
I-4 3I I-4 3I
0 - 0 = a11 = 0
3 - 3 = a12 = 0
-4 - -4 = a21 = 0
3 - 3 = a22 = 0
C - A . B =
I0 0I
I0 0I
Matriz nula
O c21 será -4
