Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 10 - Section 10.5 - Finding Factors of Special Products - Exercise - Page 354: 32



Work Step by Step

This is a perfect square trinomial, and hence $$ n^2-30n+225=(n-15)(n-15) .$$ One can check as follows $$ (n-15)(n-15)=n^2-15n-15n+225=n^2-30n+225 .$$
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