Answer
$(a^{2}+3)(a^{2}-5)$
Work Step by Step
Step 1: $a^{4}-2a^{2}-15$
Step 2: $a^{4}+3a^{2}-5a^{2}-15$
Step 3: $a^{2}(a^{2}+3)-5(a^{2}+3)$
Step 4: $(a^{2}+3)(a^{2}-5)$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 6 - Section 6.2 - Factoring Trinomials of the Form x2+bx+c - Exercise Set - Page 428: 15
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