Question

Преобразуйте в многочлен:
2(c-1)(c+2)-(c+6)^2

Answer 1

$2(c - 1)(c+2)-(c+6)^2=2(c^2+2c-c-2)-(c^2+12c+36)= \\ = 2c^2 +2c-4-c^2-12c-36=c^2-10c-40$