Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 1 - Review - Exercises: 40

Answer

$(1+x)(2-x)-(3-x)(3+x)=x-7$

Work Step by Step

$(1+x)(2-x)-(3-x)(3+x)$ Evaluate both products and simplify: $(1+x)(2-x)-(3-x)(3+x)=...$ $...=(2-x+2x-x^{2})-(9-x^{2})=...$ $...=-x^{2}+x+2+x^{2}-9=...$ $...=x-7$
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