Elementary Algebra

$-5x^{2}-12x-7$
Multiplying each term of the first parenthetical expression by the second parenthetical expression and then combining like terms, we obtain: $(-x-1)(5x+7)$ =$-x(5x+7)-1(5x+7)$ =$-5x^{2}-7x-5x-7$ =$-5x^{2}-12x-7$