Determinati numarul natural a, pentru care [tex]\sqrt{a2+2a}[/tex] este un numar natural (a2 si 2a sunt in baza 10)

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2 September 2025 matematica 5 minute
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Clasă: Education Materie: matematica
Determinati numarul natural a, pentru care [tex]\sqrt{a2+2a}[/tex] este un numar natural (a2 si 2a sunt in baza 10)
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Explicație pas cu pas:

|a2 +|2a =10a+2+20+a=11a+22 =11(a+2)

V11(a+2) €N => 11(a+2) p.p =>a+2=11 => a=9

Răspunsul a fost dat în data 2 September 2025

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