решите пример (c+2)(c-3)-3(c-1)^2

Question

решите пример (c+2)(c-3)-3(c-1)^2

Answer 1

(c+2)(c-3)-3(c-1)^2 =с^2-3c+2c-6-3(c^2-2c+1)=c^2-3c-6-3c^2-2C+1=-2c^2-5c-5