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Ecuatie cu numere naturale
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Ecuatie cu numere naturale
Posted:
Thu Jun 25, 2009 10:48 am
by
salazar
Rezolvati in multimea nr. naturale ecuatia:
\( 4m^2+4n=n^2+4m+11 \)
.
G.M 3/2009
Posted:
Thu Jun 25, 2009 10:55 am
by
Mateescu Constantin
Ecuatia se scrie:
\( 4m^2-4m+1=n^2-4n+4+8 \)
\( \Longleftrightarrow (2m-1)^2=(n-2)^2+8 \)
\( \Longleftrightarrow (2m-1+n-2)(2m-1-n+2)=8 \)
De aici e simplu.