Editing E:15990
Revision as of 20:58, 7 November 2023 by Andreea Marincas (talk | contribs) (Pagină nouă: '''E:15990 (Cristina Vijdeluc și Mihai Vijdeluc, Baia Mare )''' ''Aflați numărul'' <math>\overline{xyzt}= \overline{ab}\cdot\overline{ac}</math>, ''știind că'' <math>\overline{a,b}+\overline{a,c}=p^2</math> și <math>\overline{ab}-\overline{ac}=q^2</math>, ''unde p și q sunt numere prime.'' '''Soluție:''' ''Din <math>\overline{a,b}+\overline{a,c}=p^2</math> rezultă <math>\overline{ab}+\overline{ac}=10\cdot p^2</math>. Adunăm cu <math>\overline{ab}-\overline{ac}=q^...)
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