Answer:
b.
Explanation:
the result is created :
first result row first result element =
= first A row × first B column
first result row second result element =
= first A row × second B column
...
third result row second result element =
= third A row × second B column
third result row third result element =
= third A row × third B column
the multiplication of a row and a column is done by :
left row element × top column element +
middle row element × middle column element +
right row element × bottom column element
AB =
-4×3 + -3×-5 + 5×-1 -4×-4 + -3×-5 + 5×-3 -4×-1 + -3×1 + 5×2
-5×3 + -4×-5 + -2×-1 -5×-4 + -4×-5 + -2×-3 -5×-1 + -4×1 + -2×2
-1×3 + -2×-5 + -4×-1 -1×-4 + -2×-5 + -4×-3 -1×-1 + -2×1 + -4×2
=
-2 16 11
7 46 -3
11 26 -9
so, b is correct.