Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 8 - Polynomials and Factoring - Chapter Test: 30

Answer

18

Work Step by Step

$(n+9)^{2}$ Use FOIL to simplify. FOIL: First (Multiply the first variables in the brackets), outside (Multiply the outer variables), Inside (Multiply the inside variables), Last (Multiply the last variables in the brackets). (n)(n) + 9(n) + 9(n) + (9)(9) $n^{2}$ + 9n + 9n + 81 We add the 9n and 9n to get the simplified answer. $n^{2}$ + 18n + 81 Thus the middle term is 18n and the number is 18.
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