# Suppose that p(x) is a polynomial with integer coefficients of degree 3 and x = 2 is ??a zero, and x = v 5 is a zero.

What must the third zero be? Why? Similarly, for any √ ?polynomial with integer coefficients, if it has one irrational zero of the form a + b c (with a, b, c integers, and c > 0), what can...