Jojo215 Jojo215

21-07-2015
Mathematics

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Is 12a-a simplified?

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Аноним Аноним

21-07-2015

12a−a

=12a−1a

=12a+−1a

=a+a+a+a+a+a+a+a+a+a+a+a+−a

=a+a+a+a+a+a+a+a+a+a+a

=11a

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