SOLUTION: E is the ellipse with foci at (4,-2) and (4,8) whose major axis has length 20

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Question 875136: E is the ellipse with foci at (4,-2) and (4,8) whose major axis has length 20
Answer by josgarithmetic(39621) About Me  (Show Source):
You can put this solution on YOUR website!
Those tell you that a=10, c=%288-%28-2%29%29%2F2=5, and center is (4,3).

The relationship among a, b, and c, is b%5E2%2Bc%5E2=a%5E2, meaning b%5E2=a%5E2-c%5E2.

The standard form equation which you still need to finish, is:
highlight_green%28%28y-3%29%5E2%2F100%2B%28x-4%29%5E2%2Fb%5E2=1%29.
Notice carefully how a and b are positioned. The MAJOR axis and vertices are vertical.


I KNOW I made a mistake there, but I will leave this solution up anyway. Maybe I will find the mistake...(Mistake found and corrected).