Answer
$(7m^4+3n)(7m^4-3n)$
Work Step by Step
Step 1. Rewrite the expression as $49m^8-9n^2=(7m^4)^2-(3n)^2$
Step 2. Use the formula $A^2-B^2=(A+B)(A-B)$, we have $49m^8-9n^2=(7m^4)^2-(3n)^2=(7m^4+3n)(7m^4-3n)$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter R - Review of Basic Concepts - Chapter R Test Prep - Review Exercises - Page 83: 69
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