document.write( "Question 419385: Find the foci of the ellipse with the equation 18x^2+36y^2=648. Graph the ellipse. \n" ); document.write( "

Algebra.Com's Answer #293301 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "18x^2+36y^2=648
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document.write( " 18x^2/648 + 36y^2/648 = 1
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document.write( "   x^2/36 + y^2/18 = 1
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document.write( " sqrt(36-18) = sqrt(18) = 3sqrt(2)
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document.write( "foci are (3sqrt(2),0) and (-3sqrt(2),0)
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