maaaaarrrrrryy

matrices, i learned alot between this class and number theory so i'm just gonna go over what i know because i can't remember what i learned in which class.

First of all.
when you add matrices, you just add the corresponding numbers, if you need an example, shame on you.

when you subtract, it goes the same as adding, your answer will be the same dimensions as the two you are adding/subtracting because they have to be the same dimensions to perform those actions anyway
Ex.3 4 - 4 6 = -1 -2
2 0 5 8 -3 -8
Next.
Multiplying/dividing
when you multiply matrices, you first have to seee if you can by checking the dimensions.
Ex. 2 x 3 3 x 4 Possible
3 x 4 3 x 4 not possible
the inside numbers will be the same if its possible, and your product will be the outside numbers.
Ex. 2 x 3 x 3 x 4 = 2x4
and you multiply row by column, and you add numbers and stuff and its really complicated. but you can figure it out if you do row by column.