Question

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

I posted a picture of each matrix. Thank you!

Answer 1

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.

Answer 2

If the determinant is zero, it has no inverse.

Answer 3

you can definitely rule out the choice both are equal.

Answer 4

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

Answer 5

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

Answer 6

Right.

Answer 7

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

Answer 8

Okay! thanks :)