Calculus with Applications (10th Edition)

Published by Pearson
ISBN 10: 0321749006
ISBN 13: 978-0-32174-900-0

Chapter R - Algebra Reference - R.2 Factoring - R.2 Exercises - Page R-8: 9



Work Step by Step

Consider all the pairs of factors of $5b^2$. Find the pair that sum to $-6b$: $$(-5b)\times (-b)=5b^2$$ $$-5b-b=-6b$$ $$a^2-6ab+5b^2=(a-5b)(a-b)$$
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