document.write( "Question 1153875: Find the equation of the circle with center at the origin and x-intercepts 9 and -9 \n" ); document.write( "

Algebra.Com's Answer #776181 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+%28+x+-+h+%29%5E2+%2B+%28+y+-+k+%29%5E2+=+r%5E2+\"$
\n" ); document.write( "( h, k ) = ( 0,0 )
\n" ); document.write( "The circle goes through ( 9, 0 ) and ( -9, 0 )
\n" ); document.write( " $\"+%28+x+-+0+%29%5E2+%2B+%28+y+-+0+%29%5E2+=+r%5E2%0D%0A%7B%7B%7B+x%5E2+%2B+y%5E2+=+r%5E2+\"$
\n" ); document.write( " $\"+9%5E2+%2B+0%5E2+=+r%5E2+\"$
\n" ); document.write( " $\"+r+=+9+\"$
\n" ); document.write( "The equation is:
\n" ); document.write( " $\"+x%5E2+%2B+y%5E2+=+9+\"$ \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );