Question

Даю 100 баллов за скорость!

Answer 1

${x}^{3} + 3 {x}^{2} - x - 3 = ( {x}^{3} + 3 {x}^{2} ) + ( - x - 3) = \\ = {x}^{2} (x + 3) - (x + 3) = ({x}^{2} - 1)(x + 3)$

Ответ: 1)