#### Answer

$x^2-1.$

#### Work Step by Step

We can use that the product of a binomial sum and a binomial difference is: $(A+B)(A-B)=A^2-B^2$.
E.g. $(x+1)(x-1)=x^2-1^2=x^2-1.$

Published by
Pearson

ISBN 10:
0-13417-894-7

ISBN 13:
978-0-13417-894-3

$x^2-1.$

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