Answer
$F(p,0)$, $x=-p$.
$F(3,0)$, $x=-3$
Work Step by Step
The graph of $y^2=4px$ is a parabola with focus $F(p,0)$ and directrix $x=−p$.
Hence the graph of $y^2=12x$ is a parabola with focus $F(3,0)$ and directrix $x=−3$.
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter 7, Conic Sections - Section 7.1 - Parabolas - 7.1 Exercises - Page 554: 3
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