Respuesta :
The answer is 10.
(a - b)² = a² + 2ab + b²
(-x - 5)² = (-x)² - 2 * (-x) * 5 + 5²
= x² + 10x + 25
(a - b)² = a² + 2ab + b²
(-x - 5)² = (-x)² - 2 * (-x) * 5 + 5²
= x² + 10x + 25