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: 31

Answer

(r-4)(r+1)

Work Step by Step

Given the polynomial $r^{2}$ - 3r - 4 *** We break of the middle term into two factors that add to give -3 and multiply to give -4. The two numbers are -4 and +1. $r^{2}$ - 4r +1r - 4 We take the GCD of the first two and the GDC of the last two terms. r(r-4) +1(r-4) We take (r-4) and factor it out which gives us. (r-4)(r+1)
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