The equation of a circle:

(h,k) - the coordinates of the centre
r - the radius
The midpoint of the diameter is the centre of a circle.
The coordinates of the midpoint:

(x₁,y₁), (x₂,y₂) - the coordinates of endpoints

The centre of the circle is (2,5).
The radius is the distance between an endpoint of the diameter and the centre.
The formula for distance:


The radius is 5.
1 because 10/9= 1 1/10
which is closer to 1
Answer:
(0,5) (0,-5)
Step-by-step explanation:
The derivative of (x+1)^2, for this you use the chain rule, to get 2x+2.