Question

Разложить на множители​

Answer 1

$b^2c^2-4bc-b^2-c^2+1=b^2c^2-bc-bc-bc-bc-b^2-c^2+1-b^2c-\\ \\ -bc^2+b^2c-b+bc^2-c+b+c=bc(bc-b-c-1)+b(bc-b-c-1)+\\ \\ +c(bc-b-c-1)-(bc-b-c-1)=(bc-b-c-1)(bc+b+c-1)$

Answer 2

Решение во вложение.