Lattice Multiplication of Polynomials

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This Demonstration shows the multiplication of two polynomials using a method analogous to lattice multiplication for positive integers. The totals of the diagonals give the answer. You can figure out the steps in the method by studying a few solutions.
Contributed by: Izidor Hafner (December 2016)
Open content licensed under CC BY-NC-SA
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"Lattice Multiplication of Polynomials"
http://demonstrations.wolfram.com/LatticeMultiplicationOfPolynomials/
Wolfram Demonstrations Project
Published: December 1 2016