Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10: 9781285195698
ISBN 13: 978-1-28519-569-8

Appendix A - A.4 - Quadratic Equations - Exercises - Page 550: 10

Answer

$x^2-9x+14 = (x-2)~(x-7)$

Work Step by Step

Let's consider a trinomial in this form: $~x^2+bx+c$ To factor this trinomial, we need to find two numbers $r$ and $s$ such that $r+s = b$ and $r\times s = c$ Then we can factor the trinomial as follows: $~x^2+bx+c = (x+r)~(x+s)$ Let's consider this trinomial: $~x^2-9x+14$ To factor this trinomial, we need to find two numbers $r$ and $s$ such that $r+s = -9$ and $r\times s = 14$. We can see that $(-2)+(-7) = -9~$ and $(-2)\times (-7) = 14$ We can factor the trinomial as follows: $x^2-9x+14 = (x-2)~(x-7)$
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