Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 1-11 - Cumulative Review - Page 776: 9

Answer

$(3t+4)(2t+9)$

Work Step by Step

Using the factoring of trinomials in the form $ax^2+bx+c$ method, the expression \begin{align*} 6t^2+35t+36 \end{align*} has $ac= 6(36)=216 $ and $b= 35 .$ The two numbers with a product of $ac$ and a sum of $b$ are $\left\{ 8, 27 \right\}.$ Using these $2$ numbers to decompose the middle term of the trinomial expression above, we find: \begin{align*} 6t^2+8t+27t+36 .\end{align*} Grouping the first and second terms and the third and fourth terms, the expression above is equivalent to \begin{align*} (6t^2+8t)+(27t+36) .\end{align*} Factoring the $GCF$ in each group results in: \begin{align*} 2t(3t+4)+9(3t+4) .\end{align*} Factoring the $GCF= (3t+4) $ of the entire expression above results in: \begin{align*} (3t+4)(2t+9) .\end{align*} Hence, the factored form of $6t^2+35t+36$ is $ (3t+4)(2t+9) $.
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