I need help with solving this. I'm really struggling with understanding matrices.

What is the solution for the determinant?

1 7

0 -3

(Those numbers are in brackets)

Thank you to anyone who can explain this to me! I don't want to be given the answer, I actually want to learn how to do this. I have several more problems like this one to solve.

Question

I need help with solving this. I'm really struggling with understanding matrices. 

What is the solution for the determinant? 

1      7

0      -3 

(Those numbers are in brackets)

Thank you to anyone who can explain this to me! I don't want to be given the answer, I actually want to learn how to do this. I have several more problems like this one to solve.

amistre64 · Answer

a 2x2 matrix has a simple shortcut for a determinant

a  b
c  d

det = ad - bc

anonymous · Answer

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