Can someone help me find the answer been trying for like 30 mins and can't seem to find whats wrong: Find the constant sum for an ellipse with foci F1 (-20, 0), F2 (20, 0) and the point on the ellipse (-21, 0).

Question

apollo928 · Answer

sqrt(-20-0)^2+(-21-0)^2+sqrt(20-0)^2+(-21-0)^2 this how I set it up

apollo928 · Answer

42

	48

	26

	35
Possible answers

zale101 · Answer

Your question is asking to find the constant sum for an ellipse meaning which means you have to find the distance/length of the line segments from each of the foci to the given points.

You always use the distance formula to find any length or distance of two given points.

apollo928 · Answer

So is my set up incorrect