Răspunsuri

2014-07-11T17:20:05+03:00
C²₂₀₀₉= C²⁰⁰⁹⁻² ₂₀₀₉= C²⁰⁰⁷ ₂₀₀₉

C² ₂₀₀₉ -C²⁰⁰⁷ ₂₀₀₉= C²⁰⁰⁷ ₂₀₀₉ -C²⁰⁰⁷ ₂₀₀₉= 0