document.write( "Question 1003855: how to I write an equation of the parabola with focus F(0,4) and directrix y=-4 using the distance formula \n" ); document.write( "
Algebra.Com's Answer #620463 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
Study both of these:\r
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\n" ); document.write( "\n" ); document.write( "Deriving parabola equation if vertex at Origin\r
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\n" ); document.write( "\n" ); document.write( "Same thing but vertex NOT at Origin
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