Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 2 - Section 2.2 - Quadratic Functions - Exercise Set - Page 330: 51

Answer

\[f\left( x \right)=2{{\left( x+10 \right)}^{2}}-5\]

Work Step by Step

We know that the quadratic function in its standard form can be written as $f\left( x \right)=a{{\left( x-h \right)}^{2}}+k,\,\,\,\,\,\,\,\,a\ne 0$. Here, $a,h,k$ are constants and $x$ is a variable. The graph of $f\left( x \right)$ is a parabola which is symmetric about the line $x=h$. The coordinates of the vertex of the parabola is $\left( h,\ k \right)$. Put $a=2,\ h=-10,\ k=-5.$ Thus, the function in standard form with shape similar to the given function and vertex at $\left( -10,-5 \right)$ is written as $f\left( x \right)=2{{\left( x+10 \right)}^{2}}-5$.
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