October 2018 2 28 Report

Dam naj

4(k-l)(k+l) + 4(k-l) = 4(k-l)(k+l+1)

Możecie mi wytłumaczyć dlaczego z tego: 4(k-l)(k+l) + 4(k-l)

wychodzi to: 4(k-l)(k+l+1)


tj. u góry


Pokażcie krok po kroku jak to wychodzi.



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