Question

I need help with inverse matrices !?!?!?!

Answer 1

So whats your doubt ?

Answer 2

you don't know the conclusion from the steps? when you get the last matrix in that form, that call identity matrix and it shows that 2 given matrices are inverse of each other

Answer 3

So... How will I figure out what DC is?

Answer 4

write D first, then C

like, given is CD, where C was written first.

then multiply, according to multiplication rules.
if you get the identity matrix again, then C and D are inverses of each other

Answer 5

I know that, but what are the multiplication rules?

Answer 6

the multiplication rules ?
let me show you.