Question

I need help finding the inverse of the matrix
p=[4 4, 4,-5]=20-16=4≠0

Answer 1

4 4 | 1 0
4 -5 | 0 1

row reduction yields

1 0 | 5/36 1/9
0 1 | 1/9 -1/9

you can factor out 1/36 to get

1/36 * 5 4
4 -4

Answer 2

Okay so that's how to find the answer? and is 5 4 the answer?
4 -4

Answer 3

no, the answer is 5/36 1/9
1/9 -1/9

Answer 4

oh okay, thanks! :)