12-5

today im teaching you 12-5 which is the same as everything in 12-2 through 12-4 except it had three variables instead of 2. it has an x y and z. so all the formulas are the same except you just add a z to the equations and do it like that. i will provide an example below.

EX:
simplify:
(3,8,-2) + 2(4,-1,2)
you do the same first + first, second + second, third + third.
distrubute first
(3,8,-2) + (8,-2,4) = (11,6,2)