Question

whats the inverse matrix for -8, 7, 5
2,-8 ,4
-4,2,-4
tried doing it even on a online matrix calculator but it doesnt work HELP

Answer 1

inverse is the last entry here
http://www.wolframalpha.com/input/?i= {{-8%2C+7%2C+5}%2C{+2%2C-8+%2C4}%2C{-4%2C2%2C-4}}

Answer 2

-8,7,5 | 1,0,0
2,-8,4 | 0,1,0
-4,2,-4| 0,0,1
ur going to try making the left side the identity, which will make the identity on the right the inverse of ur matrix

Answer 3

gotta copy and paste, link wont work

Answer 4

ok thanks ill check it out

Answer 5

if you're solving it traditionally, the inverse of a matrix is (1/determinant of the matrix) multiply with the adjoint of the matrix

Answer 6

i dont know i think the problem is messed up caused i tried does numbers that are in wolfram and it says its wrong