ecuatie in Z

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handleman
Euclid
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Joined: Sun Mar 16, 2008 5:01 pm
Location: bucuresti

ecuatie in Z

Post by handleman »

a)Rezolvati in multimea numerelor intregi ecuatia: 3xy+2x=5y+1.
astai grea
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Marius Dragoi
Thales
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Joined: Thu Jan 31, 2008 5:57 pm
Location: Bucharest

Post by Marius Dragoi »

\( (3y+2)(3x-5)=-7 \)
\( 3y+2=-7 \Rightarrow y=-3 \Rightarrow x=2 \);
\( 3y+2=-1 \Rightarrow y=-1 \Rightarrow x=4 \);
\( 3y+2=1 \Rightarrow y \notin Z \);
\( 3y+2=7 \Rightarrow y \notin Z \).
Politehnica University of Bucharest
The Faculty of Automatic Control and Computers
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