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Aflati domeniul valorilor admisibile al raportului algebric :a)5x-9 asupra lui -4x la patrat +16 va roooooooooooggggggggmuuuuuuuuuuuuuulllllllttttttttttttttt

Răspuns :

-4x²+16≠0, 4x²-16≠0 (2x-4)(2x+4)≠0
DVA=R-{-2,2}