Question

Formule de calcul prescurtat

Answer 1

(a+b)^2=a^2+2ab+b^2
a^3+b^3=(a+b)(a^2+ab+b^2)
a^2-b^2=(a+b)(a-b)
a^3+a^2b+3ab^2+b^3=(a+b)^3
a^2+b^2+c^2+2ab+2ac+2bc=(a+b+c)^2
Sper ca te-am ajutat!!!