Originally Posted by
jordo6889
Find AB where
and
Just place them side by side like this:
Then, multiply the numbers.
1. 1st row, multiplied by first column. Here, first of the row multiplied by first or the column, second of the row multiplied by second in the column. Then, add the two results and put them in the first position of a 2x2 matrix.
2. 1st row multiplied by second column. Here again, first of the row multiplied by first or the column, second of the row multiplied by second in the column. Then, add again the two results and put them in the second horizontal position of a 2x2 matrix.
3. 2nd row multiplied by first column. Here again, first of the row multiplied by first or the column, second of the row multiplied by second in the column. Then, add again the two results and put them in the first position of the second row of a 2x2 matrix.
4. 2nd row multiplied by second column. Here again, first of the row multiplied by first or the column, second of the row multiplied by second in the column. Then, add again the two results and put them in the second position of the second row of a 2x2 matrix.
Like this: