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The browser that is used for submitting questions does not permit many mathematical symbols. It is therefore not possible to be sure what the question was. For a quadratic equation of the form y = ax^2 + bx + c, where a, b and c are real numbers and a is non-zero, the discriminant is b^2 – 4ac.

Note that the equation must first be written with descending powers of x so as to identify a, b and c.

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Q: What is the discriminant of 9x2 2 10x?
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