AI's Answer
A matrix is a rectangular array of numbers or symbols organized in rows and columns. Matrices are commonly used in mathematics and computer science to represent and solve systems of linear equations, transformations, and other mathematical operations. Each element in a matrix is identified by its row and column position, and the dimensions of a matrix are given by the number of rows and columns it contains. Matrices can be added, subtracted, multiplied, and inverted to perform various computations in mathematics and computer programming.