J.J sylvester

A matrix in mathematics is a rectangular array of quantities or expressions set out by rows and columns.

To square a matrix, simply multiply the matrix by itself. It is just like squaring any other regular number in mathematics.

In mathematics, a matrix refers to a rectangular array of numbers, symbols, or expressions. The parts of the matrix are called elements, and are organized into rows and columns.

A matrix relates to math by being a scientific measuring unit. In other words, any shape can have a matrix that also has the plausibility to be measured.