Linear Algebra: Formula for 2x2 inverse
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Figuring out the formula for a 2x2 matrix. Defining the determinant.
More free lessons at: http://www.khanacademy.org/video?v=eEUK_ThrHuQ
More free lessons at: http://www.khanacademy.org/video?v=eEUK_ThrHuQ
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