Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 4 - Polynomials - 4.7 Polynomials in Several Variables - 4.7 Exercise Set - Page 285: 78



Work Step by Step

We use the equation for the area of a triangle to find: $$ A=\frac{1}{2}bh \\ A=\frac{1}{2}\left(x-y\right)\left(x+2y\right) \\ A=\frac{x^2+xy}{2}-y^2$$
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