document.write( "Question 188878: Graph 9x^2+y^2=9
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document.write( "Give the coordinates of the foci \n" );
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Algebra.Com's Answer #141667 by Mathtut(3670) ![]() You can put this solution on YOUR website! \n" ); document.write( ": \n" ); document.write( " \n" ); document.write( ": \n" ); document.write( "c=(+-)sqrt(8) \n" ); document.write( ": \n" ); document.write( "c=(+-)2sqrt(2) \n" ); document.write( ": \n" ); document.write( "foci are at (0,+2sqrt(2)) and (0,-2sqrt(2)) \n" ); document.write( " |