Question

what is a matrix
and what is a row and columns​

Answer 1

Definition of Matrix. A matrix is a collection of numbers arranged into a fixed number of rows and columns. Usually the numbers are real numbers. In general, matrices can contain complex numbers but we won't see those here.

In short to understand, row is collection of cells in a horizontal direction while column is a collection of cells in a vertical direction

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Answer 2

HELLO MATE HERE IS YOUR ANSWER.

The numbers, symbols, or expressions in the matrix are called its entries or its elements. The horizontal and vertical lines of entries in a matrix are called rows and columns, respectively