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a fost răspuns

descompuneti in factori: a) x(x+1)²+(x+1)²

Răspuns :

[tex]x(x+1)^2+(x+1)^2=(x+1)^2(x+1)= (x^{2} +2x+1)(x+1)= x^{3} +\\+ x^{2} +2 x^{2} +2x+x+1= x^{3}+3 x^{2} +3x+1=(x+1)^3 [/tex]

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