Comparing Matrices. I don't know how to do this! Can anyone help?

I posted a picture of each matrix. Thank you!

Question

Comparing Matrices. I don't know how to do this! Can anyone help? 

I posted a picture of each matrix. Thank you!

anonymous · Answer

attachment

phi · Answer

they want you to know that the determinant (the ad - bc calculation) is 0 if the matrix is NOT invertible.  if the determinant is not zero, the matrix is invertible.

anonymous · Answer

If the determinant is zero, it has no inverse.

phi · Answer

you can definitely rule out the choice both are equal.

phi · Answer

here is what you (should!) know
det(A)= 0    det(B)≠0  (but its sign is unknown, it could be + or - number)

anonymous · Answer

But there are no values, so the answer would be that is can't be solved with the information supplied, right?

anonymous · Answer

Right.

phi · Answer

the only thing you know is that det(A) ≠ det(B)

anonymous · Answer

Okay! thanks :)