Each number is called an entry.
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matrix
Multiply the number in matrix one with the corresponding number in matrix two: Matrix 1 Matrix 2 result 2x 3x 4x 6x = 8x2 18x2 4x 5x x 3x 4x2 15x2
A rectangle containing numbers are called "matrix" (1 0 0 1) (3 4 8 0) is a 2 x 4 matrix a SQUARE containing numbers is a n x n matrix, or square matrix (1 0) (5 6) is a square matrix (1) is a square matrix
A matrix (plural matrices, or less commonly matrixes) is a rectangular array of numbers, such as an item in a matrix is called an entry or an element.
It is either a row vector (1 x m matrix) or a column vector (n x 1 matrix).