(c-4-(3-c))*(c-4+(3-c))
(c-4-3+c)*(c-4+3-c)
(2c-7)*(-1)
-1(2c-7)
Объяснение:
(c-4)^2-(3-c)^2=9c-4-(3-c))(c-4+(3-c))=(c-4-3+c)(c-4+3-c)=(2c-7)(-1)=-1(2c-7)
