Big Ideas Math - Algebra 1, A Common Core Curriculum

Published by Big Ideas Learning LLC
ISBN 10: 978-1-60840-838-2
ISBN 13: 978-1-60840-838-2

Chapter 7 - Polynomial Equations and Factoring - 7.5 - Factoring x 2 + bx + c - Exercises - Page 389: 13

Answer

$(w-9)(w-8)$.

Work Step by Step

The given polynomial is $=w^2-17w+72$ Standard form is $x^2+bx+c$. We have $b=-17$ and $c=72$. $b$ is negative and $c$ is positive. Factor pair of $72$, whose sum is $-17$:- $-9,-8$ The values of $p$ and $q$ are $-9$ and $-8$. Hence, the factor of the polynomial is $(w+p)(w+q)=(w-9)(w-8)$. Check:- $=(w-9)(w-8)$ $=w^2-8w-9w+72$ $=w^2-17w+72$ True.
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