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Descompuneti in factori expresia E(x)=x^4+2x^3+3x^2+2x+1

Răspuns :

E(x)=x⁴+2x³+3x²+2x+1
E(x)= x⁴+x²+1+ 2*x *x² + 2* x *1 +2 * x² * 1
Asadar:
E(x)=(x²+x+1)²

In fine,nu era asa de usor de observat...