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MathNet 2026 — Part 10 Question 9

Math Olympiad Vault · MathNet 2026 — Part 10

Question 9

Suppose that $b$ and $c$ are real numbers such that the equation
$$
x^{2}+b x+c=0
$$
has two different solutions $x_{1}, x_{2}$. Suppose that


a. The (positive) difference between $x_{1}$ and $x_{2}$ is $1$;


b. The (positive) difference between $b$ and $c$ is also $1$.

Find all possible values of $b$ and $c$.