Answer:
The correct option is A....
Step-by-step explanation:
Look at the attached picture:
A=(4,7)
B=(7,4)
The standard form of circle equation is:
(x-h)^2 +(y-k)^2 = r^2
Here h and k is the centre which is (4,4)
radius = 7-4 = 3
Now use the formula to find the answer:
(x-h)^2 +(y-k)^2 = r^2
(x - 4)^2 + (y - 4)^2 = 3^2
If we expand the formula we get:
x^2 - 8x + 16 + y^2 - 8y + 16 = 9
x^2 - 8x + y^2 - 8y + 23 = 0
Thus the correct option is A....
