Linear Algebra, Matrix, Linear System, Basics, Dot Product.
aij = 0 for all i ≠ j. Diagonal matrices. To solve a diagonal matrix is pretty easy because we already have the solution in front of us. For example, given the augmented matrix The values of the variables are That is, the solution is (5/3, -2, -2). 3.2 Triangular Matrix 3.2.1 Upper triangular