Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 8 - Polynomials and Factoring - 8-4 Multiplying Special Cases - Practice and Problem-Solving Exercises: 32

Answer

6399

Work Step by Step

Rewrite each factor as a binomial with terms that are easy to multiply using mental math. Use the product of a sum and a difference rule. $79\times81=(80-1)(80+1)=6400-1=6399$
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