Linear Algebra
Vectors, matrices and transformations.
Linear Alg
How Matrix Multiplication Works, With Worked Examples
Learn the row-by-column rule for multiplying matrices, why the dimensions must match, why order matters, and what the product means geometrically.
Linear AlgWhat Is a Determinant? A Plain Guide With Examples
Understand the determinant as the area or volume scaling factor of a matrix, learn the 2x2 and 3x3 formulas, and see why zero means no inverse.