Matrices organize numbers in rows and columns. They represent linear transformations, systems of equations, and computer graphics operations.
Matrix Addition
Add corresponding entries. Both matrices must have the same dimensions. Practice with our Matrix Calculator.
Matrix Multiplication
The product AB exists only when A's columns equal B's rows. Entry (i,j) is the dot product of row i of A and column j of B.
Determinants
For 2x2 matrix [[a,b],[c,d]], det = ad - bc. Determinants indicate whether a matrix is invertible. See the Determinant Calculator.
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