# How do you factor the trinomial c^6 + c^5 - 156c^4?

One way is to take out a common factor of ${c}^{4}$, to yield:
$\left({c}^{4}\right) \left({c}^{2} + c - 156\right)$
$\left({c}^{4}\right) \left(c + 13\right) \left(c - 12\right)$