Question

Efectuati folosind factorul comun:
(a+b)*(b+c)*(c+a)-(a+b)*(b-c)*(a+c)=
(Floricica de sus inseamna inmultit,ori)

Answer 1

(a+b)*(b+c)*(c+a)-(a+b)*(b-c)*(a+c)=(a+b)*(a+c)*(b+c-b+c)=(a+b)*(a+c)*2c