document.write( "Question 1004723: Write an equation of the parabola with the focus at (-2,0) and the directrix at x=4. \n" ); document.write( "
Algebra.Com's Answer #621115 by josgarithmetic(39620)\"\" \"About 
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Your parabola has a horizontal symmetry axis. This demonstration will help:\r
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\n" ); document.write( "\n" ); document.write( "Deriving equation for parabola, in case vertex is not at the Origin, or even if it is
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