Question

Sendo A= [1 5] [-4 1], B= [2 -2] [-3 0] e C= [1 0] [-1 4] determine:

a) A.B
b) A.A
c) A.B + B.C

Answer 1

a)A.B
(15-41).(2-2)(-30))
-26.(-4(-30))
-26(-34)
884

b)A.A
(15-41).(15-41)
-26 . (-26)
676

c)A.B+B.C
[(15-41)].[(-30).(10.-14)]
-26+[(-30.(-4))
-26+120
94