Question

Упростите выражение даю 50 баллов
(-8c - 8)(-3c+7)-(2c + 2)(5c + 9)

Answer 1

$(-8c-8)(-3c+7)-(2c+2)(5c+9)=\\\\=-8(c+1)(-3c+7)-2(c+1)(5c+9)=\\\\=(c+1)\cdot \Big (-8(-3c+7)-2(5c+9)\Big )=\\\\=(c+1)\cdot (24c-56-10c-18)=(c+1)\cdot (14c-74)$