document.write( "Question 636257: Write the equation of the circle in standard form.  Find the center, radius, intercepts, and graph the
\n" ); document.write( "circle.
\n" ); document.write( "x^2+y^2+8x+2y+8=0
\n" ); document.write( "I am having trouble with the steps involved. \n" ); document.write( "
Algebra.Com's Answer #400860 by lwsshak3(11628)\"\" \"About 
You can put this solution on YOUR website!
Write the equation of the circle in standard form. Find the center, radius, intercepts, and graph the
\n" ); document.write( "circle.
\n" ); document.write( "x^2+y^2+8x+2y+8=0
\n" ); document.write( "**
\n" ); document.write( "Standard form of equation for a circle: \"%28x-h%29%5E2%2B%28y-k%29%5E2=r%5E2\", (h,k)=(x,y) coordinates of center, r=radius.
\n" ); document.write( "x^2+y^2+8x+2y+8=0
\n" ); document.write( "complete the square
\n" ); document.write( "x^2+8x+y^2+2y+8=0
\n" ); document.write( "(x^2+8x+16)+(y^2+2y+1)=-8+16+1
\n" ); document.write( "Equation:
\n" ); document.write( "\"%28x%2B4%29%5E2%2B%28y%2B1%29%5E2=9\"
\n" ); document.write( "..
\n" ); document.write( "r^2=9
\n" ); document.write( "radius=3
\n" ); document.write( "..
\n" ); document.write( "center:(-4,-1)
\n" ); document.write( "..
\n" ); document.write( "x-intercepts:
\n" ); document.write( "set y=0
\n" ); document.write( "(x+4)^2+1=9
\n" ); document.write( "(x+4)^2=8
\n" ); document.write( "x+4=±√8
\n" ); document.write( "x=-4±√8
\n" ); document.write( "x≈-6.83
\n" ); document.write( "or
\n" ); document.write( "x≈-1.17
\n" ); document.write( "..
\n" ); document.write( "See graph below:
\n" ); document.write( "y=±(9-(x+4)^2)^.5-1\r
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