document.write( "Question 188599: Give the vertex, focus, directrix, and the distance across parabola at focus, and then graph the parabola.\r
\n" ); document.write( "\n" ); document.write( "y^2-8x-2y-15=0 \n" ); document.write( "

Algebra.Com's Answer #141449 by Mathtut(3670) $\"\"$ $\"About$

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$\"8x=%28y%5E2-2y%2B1%29-1-15\"$
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\n" ); document.write( " $\"8x=%28y-1%29%5E2-16\"$
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\n" ); document.write( " $\"x=1%2F8%28y-1%29%5E2-2\"$
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\n" ); document.write( "vertex is at (-2,1)
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\n" ); document.write( "1/4p=1/8--->4p=8-->p=2
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\n" ); document.write( "focus is at (0,1) and directrix is x=-4
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\n" ); document.write( "distance across parabola at focus is 4p 4(2)=8
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\n" ); document.write( " $\"graph%28300%2C300%2C-10%2C10%2C-10%2C10%2Csqrt%288x%2B16%29%2B1%29\"$ \n" ); document.write( "

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