Stand and Deliver is a film dramatizing the work of Jaime Escalante, a dedicated East Los Angeles, California high school mathematics teacher. In the film, he helped 18 students who to pass the Calculus AP exam, although many of them were still having trouble with multiplication and fractions.
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... a single fraction; the common denominator is 4a2. We get
<math>\left(x+\frac{b}{2a}\right)^2=\frac{-4ac+b^2}{4a^2}=\frac{b^2-4ac}{4a^2}.</math>
Taking ...