Answer:
2 - √3
Explanation:
If the polynomial is degree 2, then it has 2, 1 or 0 zeros.
If the polynomial is degree 2 and the zeros are 2 irrational numbers, then they are in the form a + b√c and a - b√c.
Therefore if one of the zero is 2 + √3, then the other zero is 2 - √3.