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4(7n2+7n−1)

 Feb 17, 2017

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4(7n2+7n−1)=28n2+28n-4

 Feb 17, 2017
 #1
avatar+12527 
+5
Best Answer

4(7n2+7n−1)=28n2+28n-4

Omi67 Feb 17, 2017

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