Algebra 2 Common Core

Published by Prentice Hall
ISBN 10: 0133186024
ISBN 13: 978-0-13318-602-4

Chapter 4 - Quadratic Functions and Equations - Mid-Chapter Quiz - Page 224: 16

Answer

$(2x+3)(x+2)$

Work Step by Step

Using the factoring of trinomials in the form $ax^2+bx+c,$ the given expression, \begin{align*} 2x^2+7x+6 \end{align*} has $ac= 2(6)=12 $ and $b= 7 .$ The two numbers with a product of $c$ and a sum of $b$ are $\left\{ 3,4 \right\}.$ Using these $2$ numbers to decompose the middle term of the trinomial expression above results to \begin{align*} 2x^2+3x+4x+6 .\end{align*} Grouping the first and second terms and the third and fourth terms, the expression above is equivalent to \begin{align*} (2x^2+3x)+(4x+6) .\end{align*} Factoring the $GCF$ in each group results to \begin{align*} x(2x+3)+2(2x+3) .\end{align*} Factoring the $GCF= (2x+3) $ of the entire expression above results to \begin{align*} (2x+3)(x+2) .\end{align*}
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