Question

Please Please Please help
Find the inverse of the matrix, if possible.

Answer 1

A=

Answer 2

A

Answer 3

B

Answer 4

C

Answer 5

D

Answer 6

cofactor, transpose, scale by 1/det

Answer 7

a b
c d



cofactors to:

d -c
-b a



transposes to

d -b
-c a


then divide by the det

Answer 8

I don't understand :(

Answer 9

the visual for a 2x2 is simple enough ... swap the ad parts, and negative the bc parts

then divide by the determinant