Question

Find the value of the determinant of the matrix

Answer 1

|A| = a(ei - fh) - b(di - fg) + c(dh - eg)

Answer 2

i do a short cut that is related to the 2x2 determinant

Answer 3

copy the first 2 columns, and tag them on the end, the run the diagonals

Answer 4

-(0-12-10)
1 -1 0 1 -1
2 1 4 2 1
5 -3 5 5 -3
+(5-20+0)

Answer 5

I vaguely remember being taught your way @amistre64

Answer 6

:) i wish i was taught my way ... lol

Answer 7

the "official" method simplifies to that way is all

Answer 8

so it would be 7?

Answer 9

Correct.

Answer 10

yay, thanks for the help guys!

Answer 11

No problemo :)