Algebra: A Combined Approach (4th Edition)

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: 80

Answer

The last term factors must have the same sign because their product must be positive meaning that they must both be negative or both be positive. If one is negative and the other positive, the product will be negative, which will not fit the polynomial being factored.

Work Step by Step

In the form "x²+bx+c" if c is positive, then the last term factors must both be positive or negative.
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