Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 5 - Exponents and Polynomials - Chapter 5 Review Problem Set - Page 230: 22



Work Step by Step

RECALL: For any real numbers a, b, and c: $a(b+c)=ab + ac$ Use the distributive property (which is shown above) to obtain: $=3x(x+1) + 7(x+1) \\=3x(x) + 3x(1) + 7(x) + 7(1) \\=3x^2+3x+7x+7 \\=3x^2+(3+7)x+7 \\=3x^2+10x+7$
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