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: 3

Answer

$(x+7)(x+1)$.

Work Step by Step

The given polynomial is $=x^2+8x+7$ Standard form is $x^2+bx+c$. We have $b=8$ and $c=7$. $b$ and $c$ is positive. Factor pair of $7$, whose sum is $8$: $7,1$ The values of $p$ and $q$ are $7$ and $1$. Hence, the factor of the polynomial is $(x+p)(x+q)=(x+7)(x+1)$. Check:- $=(x+7)(x+1)$ $=x^2+x+7x+7$ $=x^2+8x+7$ True.
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