Given #A=((1, 2), (3, 4))# and #B=((4, 3), (5, 2))#, how do you find BA?
1 Answer
Jul 20, 2016
Explanation:
To multiply matrices:

. Are they compatible?
These are both 2 X 2, Yes, The answer will also be 2 X 2. 
Correct order. AB is not the same as BA

Multiply each value in a row in turn BY the values in a column and add the answers.
The calculations are :
top row x first column:
top row x second column:
bottom row x first column:
bottom row x second column: