Question

Помогите, ПОЖАЛУЙСТА.

Answer 1

(c+m)(m-c)=(m-c)(m+c)=m²-c²
m²+2mc+c²=(m+c)²=(c+m)²
(c-m)(c-m)=(c-m)²
c²-2cm+m²=(c-m)²
(m+c)(m+c)=(m+c)²=(c+m)²
c²-cm+m²≠
(m+c)(c-m)=(c+m)(c-m)=c²-m²
m²-2mc+c²=(m-c)²