document.write( "Question 1172039: Parabola;vertex at (-1,3);directrix x=-7 \n" ); document.write( "
Algebra.Com's Answer #796984 by josgarithmetic(39630)\"\" \"About 
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\n" ); document.write( "The focus is on the other side of the vertex than the directrix.
\n" ); document.write( "Distance from vertex to directrix is 10 units. This means focus is 10 units above (-1,3). You might begin by forming an equation like \"%28x%2B1%29%5E2=4p%28y-3%29\". Taking as \"p=10\", you can finish this.
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