I need help finding all the real zeros of p

Question

Let p(x) = 2x⁴ − 12x³ + 48x² + 12x − 50.

Given that x = 3 − 4i  is a zero, find the remaining zeros of p. (Enter your answers as a comma-separated list.)

Answer 1

1) if 3-4i is root, than the conjugate (3+4i) is also a root

2) So you can divide your polynomial (long division) by (x-(3-4i)) (x-(3+4i))=x^2-6x+25

3) Factor out 2 to work with smaller numbers

4) After division you will have quadratic equation, which you will solve using formula