Matrix

Macierze

Mnożenie

http://i.imgur.com/eSqBsKy.png

https://www.khanacademy.org/math/algebra/algebra-matrices/matrix_multiplication/v/multiplying-a-matrix-by-a-matrix

Wyznacznik

http://i.imgur.com/lg0C5vL.png

http://pl.wikipedia.org/wiki/Wyznacznik

Inwersja

2x2 http://i.imgur.com/PDSPVDD.png

3x3 http://i.imgur.com/SSkEqFw.png (using: matrix of minors from submatrixes, checker -1 to get cofactors, and 1/Det)