Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 5 - Section 5.5 - Multiplying Polynomials - Practice: 7

Answer

a. $x^2+15x+50$ b. $12x^2-x-20$

Work Step by Step

a. $(x+5)(x+10)$ $=x(x+10)+5(x+10)$ $=x^2+10x+5x+50$ $=x^2+15x+50$ b. $(4x+5)(3x-4)$ $=4x(3x-4)+5(3x-4)$ $=12x^2-16x+15x-20$ $=12x^2-x-20$
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