How do you factorize this in powers of a?
x^3 + (2a + 1)x^2 + (a^2 + 2a - 1)x + (a^2 - 1)
x^3 + (2a + 1)x^2 + (a^2 + 2a - 1)x + (a^2 - 1) → (a + x + 1)(a + x - 1)(x + 1)
.
Thank you! :)
