Question

If `A=((-3, x),(2y, 0))` and `B=((4, 6),(-3, 1))`, what is `A-B`?

Answer 1

`A-B = ((-7, x-6), (2y+3, -1))`

Explanation:

In a matrix problem like this, all you have to do is subtract each element of `B` from the corresponding element in `A`.

In other words,

`((-3, x), (2y, 0)) - color(blue)(((4, 6), (-3,1)))`

is the same thing as

`((-3-color(blue)4, x-color(blue)6), (2y-(color(blue)(-3)), 0-color(blue)1))`

Simplifying each statement gives us our answer.

`((-7, x-6), (2y+3, -1))`