Intermediate Algebra (12th Edition)

Published by Pearson
ISBN 10: 0321969359
ISBN 13: 978-0-32196-935-4

Chapter 8 - Section 8.5 - Graphs of Quadratic Functions - 8.5 Exercises - Page 547: 11



Work Step by Step

$\bf{\text{Solution Outline:}}$ To find the vertex of the given quadratic function, $ f(x)=(x+3)^2-4 ,$ convert the function in the form $f(x)=a(x-h)^2+k.$ Once in this form, the vertex is located at $(h,k).$ $\bf{\text{Solution Details:}}$ In the form $f(x)=a(x-h)^2+k,$ the function above is equivalent to \begin{array}{l}\require{cancel} f(x)=(x-(-3))^2-4 .\end{array} In the function above, $h= -3 $ and $k= -4 .$ Hence, the vertex is \begin{array}{l}\require{cancel} (-3,-4) .\end{array}
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