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(x^2+x+1)^2-(x^2+x)^2-x^2 =?


Răspuns :

=(x^2+x+1)*(x^2+x+1) - x^4-2x^3 -x^2-x^2=
x^4+x^3+x^2+x^3+x^2+x+x^2+x+1-x^4-2x^3-x^2-x^2=
x^2+2x+1

SPER CA L-AM FACUT CORECT