December 2018 1 7 Report
Wyrażenie (a+b+c-d)(a+b-c+d) może być zapisane w postaci:
a) (a+b)2-(c+d)2
b) (a+b)2-(c-d)2
c)(a-b)2-(c-d)2
d)(a+b-c-d)2
proszę o wyjaśnienie
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