malipulating matrices...Cramers Rule help

i have a matrix A = [1 3 -8;4 -5 19]

and i have b = A(:,3), which gives b = [-8;19]

for cramers rule i now need to replace the 1st column of A with the column matrix b and only give me a 2x2 matrix disregarding the 3rd column, my result needs to be...

A = [-8 3;19 -5] how do i do this???

Answer 1

[Azzi Abdelmalek]

A = [1 3 -8;4 -5 19]
B=fliplr(A(:,2:3))

[Nicholas]

thanks...do i use the same function to input b in the 2nd column?

[Azzi Abdelmalek]

You can just change the order like below

A(:,[3 2])  %  b in first column
A(:,[1 3])   %  b in second column