Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 4 Quadratic Functions and Factoring - Chapter Test - Page 323: 28



Work Step by Step

If the x-intercepts of a graph are $a,b$, then the function has the form of $f(x)=k(x-a)(x-b)$. The x-intercepts are -7, -3; hence, the quadratic function becomes $f(x)=k(x+7)(x+3)$. The point (-1,12) is on the graph Thus: $f(x)=(x+7)(x+3)$.
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