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Rezolvati in R ecuatia: 2x²- 4x - 6=0

Răspuns :

[tex]2 x^{2} -4x-6=\ \textgreater \ 2( x^{2} -3x-3)=0=\ \textgreater \ 2( x^{2} +x-3x-3)=0[/tex][tex]=\ \textgreater \ 2(x(x+1)-3(x+4))=0=\ \textgreater \ 2(x-3)(x+1)=0[/tex][tex]=\ \textgreater \ (x-3)(x+1)=0=\ \textgreater \ x-3=0=\ \textgreater \ x+1=0=\ \textgreater \ x_{1} =3; x_{2}=-1 [/tex][tex]S={-1;3}[/tex]
[tex]Succes[/tex