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: 11

Answer

$$(y-7z)(y+3z)$$

Work Step by Step

In order to factor the expression: $$y^2-4yz-21z^2$$ Consider all the pairs of factors of $-21z^2$. Find the pair that sums to $-4z$: $$-7z\times 3z = -21z^2$$ $$-7z+3z=-4z$$ Therefore, $$y^2-4yz-21z^2=(y-7z)(y+3z)$$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.