document.write( "Question 852288: Find an equation of the ellipse having the given foci and sum of focal radii. (6,0), (6,6); 10 \n" ); document.write( "
Algebra.Com's Answer #513288 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!
 
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document.write( "Hi,
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document.write( " Standard Form of an Equation of an Ellipse is \"%28x-h%29%5E2%2Fb%5E2+%2B+%28y-k%29%5E2%2Fa%5E2+=+1+\" 
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document.write( "where Pt(h,k) is the center. (a variable positioned to correspond with major axis)
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document.write( " a and b  are the respective vertices distances from center
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document.write( " and ±\"sqrt%28a%5E2-b%5E2%29\"are the foci distances from center: a > b
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document.write( "sum of focal radii = 10,  a = 10/2 = 5
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document.write( "  4 = ±\"sqrt%285%5E2-b%5E2%29\"  b = 3
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document.write( "\"%28x-6%29%5E2%2F3%5E2+%2B+%28y-3%29%5E2%2F5%5E2+=+1+\" 
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