Question

Write the standard equation of each circle, please

Answer 1

First one is a circle with center at (0,0) and radius 5. equation is:-

(x - 0)^2 + (y - 0)^2 = 5^2

x^2 + y^2 = 25

2.  (x - 4)^2 + (y - 3)^2 = 25

3.  (x - 5)^2 + (y - 4)^2 = 9