## Discriminant of Quadratic Polynomial Olympiad Question

The discriminant of a quadratic polynomial ($b^2-4ac$) is a source of confusion for many students taking O Level A Maths. After explaining, students usually will understand the concept, but it remains really tricky. It is a really useful concept, and can be used here in this Math Olympiad Question:

Question:

One of the above people who answered correctly, Toshihiro Shimizu, is an IMO Gold Medalist from Japan.

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