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MIT 18.06 Linear Algebra, Spring 2010 17 Online
OpenStudy (cadteach):

Is there an error in the solution set for Elimination w/ Matrices, Unit 1, problem 2? I think they dropped some signs in the published answer? (Maybe my ver. Adobe isn't reading it correctly)?

OpenStudy (waynex):

Have you tried checking the answer by multiplying the matrix by the one they give in the answer?

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