Tag Archives: parabola

Spring Garden

Each spring, a meter by meter garden has its length increased by meters but its with decreased by centimeters. What will be the maximum attainable area of the garden? Source: NCTM Mathematics Teacher, October 2006 Solution Area in square meters … Continue reading

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2x^2=3y^2

What is the only pair of integers for which twice the square of the first equals three times the square of the second? Source: NCTM Mathematics Teacher, October 2006 Solution We are looking for integers such that . If , … Continue reading

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Equation of Parabola

A parabola with integral roots passes through the points and . Find the equation of this parabola. Source: NCTM Mathematics Teacher, December 2005 SOLUTION Let be the equation of the parabola. At point At point Rewrite Eq. Substitute the value … Continue reading

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Largest Value

The equilateral triangle has side length , and is a point on the line segment . Denote by the area of triangle and by the area of triangle . What is the largest value of the product ? Source: NCTM … Continue reading

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Parabola Passing Through Three Points

Three points , and form the vertices of an equilateral triangle. Find the equation of the parabola that passes through these three points. Source: NCTM Mathematics Teacher SOLUTION is the vertex and the focus of the parabola. Let be the … Continue reading

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