Answer
$4r^2-9$
Work Step by Step
Remember that the product of the sum and difference of the same two terms is the difference of their squares.
$(2r-3)(2r+3)=4r^2-9$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 8 - Polynomials and Factoring - 8-4 Multiplying Special Cases - Lesson Check - Page 495: 3
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