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 2 * (2a+3b) + 4 * (a-2b) =

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2 * (2a+3b) + 4 * (a-2b) =

 17.01.2016

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 #1
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2 * (2a+3b) + 4 * (a-2b) =4a+6b+4a-8b=8a-2b

laugh

 17.01.2016
 #2
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4a+6b+4a-8b

=8a-2b

 17.01.2016
bearbeitet von Gast  17.01.2016

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