document.write( "Question 1121680: Use the definition of a parabola and the distance formula to derive the standard equation of a parabola which has the orginbfor its vertex, the x-acis as the axis of symmetry, a focus of (p,0) and a directrix of x=-p. \n" ); document.write( "
Algebra.Com's Answer #737655 by solver91311(24713)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "Consider an arbitrary point P on the given parabola.\r
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\n" ); document.write( "\n" ); document.write( "By the definition of a parabola, these two measures must be equal. Set the expressions equal to each other, simplify, and solve for in terms of
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\n" ); document.write( "John
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\n" ); document.write( "My calculator said it, I believe it, that settles it
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