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I'm trying to find a matrix that is equal to the idenity matrix if u multiply 2 matrices together. Well that matrix is the inverse So i'm trying to find the inverse but the answer is wrong:

A =

-5 3

2 -9

So i found the determinant and i switched the a and d, and negated the c and b . isn't htat the inverse?

1/35-6 = 1/29

-9 -3

-2 -5

-9/29 -3/29

-2/29 -5/29

isn't thtat the inverse of A?

I also have B =

-1 6

5 -30

I need to multiply that by some matrix C so the resultant matrix is

0 0

0 0

but i can't just say C is equal to

0 0

0 0

any ideas? thanjks!

I did notice, Row 1 is just 1/5 row 2