September 2018 1 14 Report

Zapisz w jak najprostszej postaci:
a) (a+2)^2-(a-2)^2=
b) \frac{(2a\sqrt{2}-6)^2}{4}-\frac{(a-3)(a+3)}{3}=

Ważne! Proszę o rozpisanie krok po kroku ;-)


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