Answer
100-$y^{2}$
Work Step by Step
Given: (10+y)(10-y)
Use FOIL method = $10^{2}$-10y+10y-$y^{2}$
Combine like terms and simplify: 100-$y^{2}$
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 8 - Polynomials and Factoring - 8-4 Multiplying Soecial Cases - Practice and Problem-Solving Exercises - Page 508: 29
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