Algebra 1

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

Chapter 8 - Polynomials and Factoring - 8-5 Factoring X(squared) + bx + c - Practice and Problem-Solving Exercises: 30

Answer

(d-9)(d+2)

Work Step by Step

Given the polynomial $d^{2}$ - 7d - 18 *** We break of the middle term into two factors that add to give -7 and multiply to give -18. The two numbers are -9 and +2. $d^{2}$ - 9d + 2d - 18 We take the GCD of the first two and the GDC of the last two terms. d(d-9) +2(d-9) We take (d-9) and factor it out which gives us. (d-9)(d+2)
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