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Fie x = radical3 + radical5 si y = rad15 - 1 Aflai (xpatrat + ypatrat -10)totul la puterea 2008

Răspuns :

(x² +y² -10)²⁰⁰⁸=  [(√3+√5)² + (√15-1)² -10]²⁰⁰⁸=

=(3+2√15+5+15-2√15+1 -10)²⁰⁰⁸=

=(24-10)²⁰⁰⁸=

= 14²⁰⁰⁸