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so starting off where @SithsAndGiggles left off..
would i do (3)(4)* [-1^{3+2}] of
5 11
3 -2

3 * (-4) * |5 8|
|3 6|
and of course the determinant of that 2x2 is 5(6)-3(8)

wait what happened to.. (-1)^3+2?

top left corner is always a +, and it checkerboards from there

oh okay and then I just carry that 3 from the 1st expansion along the ride lol till the end.

yep, its stuck on there luck .... well something thats stuck lol

your reducing each matrix to a simpler form, the scalars from the previous attempts dont vanish

can you explain the "sign board" and little more clealy ? :) everything else makes sense

a 2x2 is the simplest case to use for an example; why do we have a subtraction sign in there?

ahhh gotcha :)

when the matrixes get large, the sign board is equivalent to using the (-1)^(n+m) adjustment :)

that's why that was used! lol that confused me, but it made sense.