Khan Academy Mathematics Matrix

What a matrix is. How to add and subtract them. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/e/matrix_dimensions?utm_source=YTdescription&utm_medium=YTdescription&utm_campaign=YTdescription About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone ...

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