Answer
49$m^{2}$ - 4$n^{2}$
Work Step by Step
1. Product of the sum and difference of two terms:
(7m + 2n)(7m - 2n) = $(7m)^{2}$ - $(2n)^{2}$
2. Solve exponents with power rules
49$m^{2}$ - 4$n^{2}$
College Algebra (11th Edition)
by Lial, Margaret L.; Hornsby John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671791
ISBN 13:
978-0-32167-179-0
Chapter R - Section R.3 - Polynomials - R.3 Exercises - Page 30: 79
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