College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter P - Prerequisites: Fundamental Concepts of Algebra - Exercise Set P.4: 19

Answer

$x^2+10x+21$

Work Step by Step

$$(x+7)(x+3)$$ $$=(x\times x)+(x\times 3)+(7\times x)+(7\times 3)$$ $$=x^2+3x+7x+21$$ $$=x^2+10x+21$$
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