Question

x^3 + 7x^2−x−7

Answer 1

Factor by grouping:

x^3 + 7x^2 - x - 7
= x^2(x + 7) -1(x + 7)
= (x + 7)(x^2 - 1)
= (x + 7)(x + 1)(x - 1)

Answer 2

Thank you