Matrix Laboratory
Operations, determinants, inverses with every row operation shown, and linear systems solved three ways side by side. Covers §3.1–3.13 of the linear-algebra material.
Matrix Operations
MATRIX A
MATRIX B
Determinant & Inverse of A
Determinant by cofactor expansion along row 1 (with the 3×3 Sarrus check where applicable); inverse by Gauss–Jordan with the full row-operation log.
Solve Ax = b — Three Methods
Gaussian elimination (row-operation log), the inverse-matrix method x = A⁻¹b, and Cramer's rule — computed side by side so the agreement itself is the verification.
COEFFICIENTS A | CONSTANTS b