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Proof Without Words: Completing the Square via the Difference of Squares

Munir Mahmood and Ibtihal Mahmood
The College Mathematics Journal
Vol. 45, No. 1 (January 2014), p. 21
DOI: 10.4169/college.math.j.45.1.021
Stable URL: http://www.jstor.org/stable/10.4169/college.math.j.45.1.021
Page Count: 1
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Abstract

Summary The difference of squares is shown as two trapezoids, which are rearranged to a rectangle. This demonstrates the algebraic identity known as completing the square.

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