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Descompuneti in factori:
x²(x+1) +x(x+1)²


Răspuns :

x^{3} + x^{2} +x( x^{2} +2x +1)=
x^{3} + x^{2} +x^{3} + 2x^{2} +x=
2x^{3} + 3x^{2} + +x