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descompuneti in factori 5x +30 x+45

Răspuns :

[tex]5x+30x+45=35x+45=5*(7x+9)[/tex]
[tex]5x+30x+45=\\\\=(5x+30x)+45\\\\=35x+45\\\\Putem\ scoate\ factor\ comun\ pe\ 5:\ \\\boxed{=5\cdot(7x+9)}[/tex]