Why is a circle round and not elliptical?

A circle is a closed curved shape that is flat. In a circle, all points on the circle are equally far from the center of the circle. An ellipse is also a closed curved shape that is flat. Instead of having all points the same distance from the center point, though, an ellipse is shaped so that when you add together the distances from two points inside the ellipse they always add up to the same number.

Examination:

8 would be inserted for y : 8^2-8-2
You would use PEMDAS to know solve the exponent first so 8 squared is 64. After you replace 8 squared with 64 you will move to the next step possible by the equation and PEMDAS. In this equation it is subtraction. So now you will subtracted 8 from 64 and will get 56 and then subtracted 2 and get 54. You solve left to right.