Question

(c-2)(c+3)-(c-1) в квадрате.
прошу помочь

Answer 1

(c-2)(c+3)-(c-1)^2=
c^2 -2c+3c-6-c^2+2c-1=3c-7

Answer 2

-(c-1)^2=-(c-1)(c-1)= -(c(c-1)-1(c-1))= -(c^2-c-c+1)=-c^2+2c-1