Given #A=((-1, 2), (3, 4))# and #B=((-4, 3), (5, -2))#, how do you find BA?
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: