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