(X+7)^4 =
Binomul lui Newton
Urgenttt !


Răspuns :

(x+7)^4 = ((x+7)^2)^2=

=(x^2 + 14x + 49)^2 =x^4+196x^2+2401+28x^3+98x^2+1372x

=x^4+28x^3+294x^2+1372x+2401