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Descompuneti in factori folosind gruparea termenilor
a)2x²+x-1=
b)2x²+3x+1=


Răspuns :

a) [tex]2 x^{2} +x-1=\ \textgreater \ 2 x^{2} +2x-x-1=\ \textgreater \ (2x-1)(x+1)[/tex]
b)[tex]2 x^{2} +3x+1=\ \textgreater \ 2 x^{2} +2x+x+1=\ \textgreater \ (2x+1)(x+1)[/tex]
[tex]Succes.[/tex]