How do I solve t^{3}+216? Thank you for your help!

You have two more complex solutions.

Use the sum of two cubes' formula,

t^3 + 216 = t^3 + 6^3 = (t+6)(t^2-6t+36) = 0

t + 6 = 0 => t = -6

or

t^2-6t+36 = 0

=> t^2-6t = -36

=> (t-3)^2 = 9-36 = -27

t = 3 +/- 3sqrt(3) i

## Comments

Yes, the second factorization from the sum of two cubes. Robert has correct my error above. As he pointed out, there should be two more complex solutions!