document.write( "Question 1045849: Write an equation of the parabola with directrix x=-1 and focus (1,-2). \n" ); document.write( "
Algebra.Com's Answer #661396 by josgarithmetic(39618)\"\" \"About 
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The question deals with the definition of a parabola. Study these and they should help very much.\r
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\n" ); document.write( "\n" ); document.write( "derive equation for parabola, vertex at origin
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\n" ); document.write( "similar, different orientation, vertex not at origin
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