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Cum scot factor comun aici?
5X(x+2)(x+2)+(x+2)(x+2)-3(x+2)


Răspuns :

5X(x+2)(x+2)+(x+2)(x+2)-3(x+2)

=(x+2)(5x+x+2+x+2-3)
=(x+2)(7x-1)