Question

I need some help with this

Answer 1

[-2 3] times [2
                    1] 

comes out to -2(2)+3(1) = -1.  Eliminate the first answer choice, due to 
                                                 the presence of that -7 instead of -1.

[-2 3] times [0
                    -3]

comes out to - 9.  This matches answer choices #2, #3 and #4.

[3,-4][2
           1]

comes out to 6-4, or 2.  Matches #2, #3, #4.


[3, -4][0
           -3]

comes out to +12, which matches answer choice #4.

Answer choice #4 is the correct one.

Review matrix multiplication if need be.  Feel free to ask questions here and now if need be.