Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 9 - Quadratic Functions and Equations - Mid-Chapter Quiz - Page 560: 30

Answer

a) The red line is $2x^2-8$, and the blue line is the other function. b) $2x^2-8$, after factoring out a $2$, is the same function as $4x^2-4$.
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Work Step by Step

Please see the graphs. $x^2-4=0$ $x^2-4+4=0+4$ $x^2 =4$ $\sqrt {x^2} = \sqrt 4$ $x=2, -2$ $2x^2-8=0$ $x^2-8+8=0+8$ $2x^2 =8$ $2x^2/2 =8/2$ $x^2 = 4$ $\sqrt {x^2} = \sqrt 4$ $x=2, -2$
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