Quadratic, Difference of Roots is 1

Consider x² + px + q = 0, where p and q are positive numbers. If the roots of the equation differ by 1, then what is p? (Your answer will be in terms of q.)

1. √4q + 1
2. q – 1
3. -√4q + 1
4. q + 1
5. √4q – 1

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