January 2019 1 196 Report
Suma dwóch liczb x i y wynosi 3, a suma kwadratów tych liczb jest równa 29. Wynika stąd, że:
A.  (x-y)^{2} =26 B. xy=4 C. (x+y)^{2} =6 D.  (x-y)^{2} =49

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