Work out the value of angle x (mathswatch)

Which of the following represents the zeros of f(x) = 6x3 − 31x2 + 4x + 5? −5, one third , one half 5, − one third , one half 5, one third , − one half 5, one third , one half

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?