# Math Help - Matrix

1. ## Matrix

Hello! There is a example that i dont get same result:/
So ima post the problem and the formula or what u say hope some1 can understand because i get the last one to 2,0,1,x^2. I am wrong or the book

2. ## Re: Matrix

Hey Petrus.

The book is right.

The expansion of the determinant of a 2x2 matrix with structure [a, b; c, d] (as represented in Octave) gives a result of a*d - b*c for the determinant.

Try using the formula to expand the result.

3. ## Re: Matrix

But wtf im kinda confused... Ik the rule work so but look at the rule we did get.. Goosh this got confused

4. ## Re: Matrix

If you can outline the specific problem you have the other readers can do their best to address it.

5. ## Re: Matrix

Ok after alot thinking i did get ut i was just confusing myself ty