Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 1-8 - Cumulative Review - Page 680: 74

Answer

$(t-4)\left(t^2+4 t+4^2\right)$

Work Step by Step

Givenv\begin{equation} t^3-64. \end{equation}vWe have a difference of cubes here to factor. This is because $64= 4^3$. Apply the difference of cubes formula: $x^3-y^3=(x-y)\left(x^2+x y+y^2\right)$. \begin{equation} \begin{aligned} t^3-64&= t^3-4^3\\ & =(t-4)\left(t^2+4 t+4^2\right)\\ & =(t-4)\left(t^2+4 t+16\right). \end{aligned} \end{equation}The factored form of the difference of cube problem is: \begin{equation} t^3-64=(t-4)\left(t^2+4 t+4^2\right). \end{equation}
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