Thursday, 28 February 2013

Algebra (Diagnostic Test): What's Wrong? (III)

Do you know where has gone wrong?




1 comment:

  1. the second step of the working is wrong because a negative times a negative s a positive therefore the correct working should be :

    4u - 2[u-5v]
    = 4u - 2u + 10v
    = 2u + 10v

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