Adding+Matrices

A __matrix__ is a rectangular arrangment of numbers in rows and colums. For instance, matrix 'A' below has two rows and three colums. The dimensions of this matrix is 2X3 (read"2 by 3"). The Numbers in a matrix are its __entries.__ IN matrix 'A' the entry in the second row and third colum is 5 EX: * * * [6 -2 5] } Rows [-2 0 5] } Rows Colums

To add or subtract matricies, you should simply add or subtract corrisponding entries. You can add or subtract matrices only if they have the same deminsions.

An example of adding matricies is.. [4 5]+[20 -3]=[24 2] [7 9]+[-23 8]=[-16 17]

An example of subtracting would be.. [7 5]-[23 4]=[-16 1] [-4 10]-[-23 3]=[19 7]

{[2 4] {[ 4 8] 2 2 {multiply the top and bottom by the numbers outside of the brackets. {[4 8] {[ 4 7]

once you get those 8 numbers add those two matrices together and that's your final answer