Does this matrix A=[2 9 -6 8] have an inverse?

If so, find the exact value of the determinant of A,

? Best Answer

If you mean {{2,9},{-6,8}} yes
{{2,9},{-6,8}}^-1 = (1/70) {{8,-9},{6,2}}
determinant = ad – bc = 70
– Chosen by Asker

cant remember when was the last time i did matrices, but im pretty sure that only square matrices have an inverse….so no…..

Source(s):
my brain?

Lol! No..
Only square matrices have an inverse.
U cannot find the adjoint of this matrix even.