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: 32

Answer

The solutions are $v=-13$ and $v=2$.

Work Step by Step

To factor the polynomial $v^{2}+bv+c$ to $(v+p)$ and $(v+q)$, we need to have $p+q=b$ and $pq=c$. In this case, $b=11$ and $c=-26$. $\implies p=13$ and $q=-2$. Then, $v^{2}+11v-26=(v+13)(v-2)$ $v^{2}+11v-26=0\implies (v+13)(v-2)=0$ Using zero-product property, we have $v+13=0$ or $v-2=0$ $\implies v=-13$ or $v=2$ The solutions are $v=-13$ and $v=2$.
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