SOLUTION: an ellipse has foci at (-5,0) and (5,0) what is the value of c squared?

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Question 544628: an ellipse has foci at (-5,0) and (5,0) what is the value of c squared?
Answer by KMST(1868) About Me  (Show Source):
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The letter c is conventionally used to represent the focal distance, half the distance between the foci. So c=5 and c%5E2=25.