document.write( "Question 408234: Can someone please help me graph this parabola? -x^2+812x-9600 I have solved for the vertex (406,484908). I know the parabola opens downward. I can get the line of symmetry also. The problem I am having is the question says to \"include solutions (roots)\". I am not sure what this means or how to do it. \n" ); document.write( "

Algebra.Com's Answer #287685 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

You can put this solution on YOUR website!
The roots are the values of x where the graph crosses the x axis (y=0)
\n" ); document.write( ":
\n" ); document.write( "In this equation find the roots using the quadratic formula:
\n" ); document.write( " $\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"$
\n" ); document.write( "in this equation a=-1; b=812; c=-9600
\n" ); document.write( " $\"x+=+%28-812+%2B-+sqrt%28812%5E2-4%2A-1%2A-9600+%29%29%2F%282%2A-1%29+\"$
\n" ); document.write( "you should get two solutions
\n" ); document.write( "x=800
\n" ); document.write( "x= 12 \n" ); document.write( "

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