Question 7488
What the question asks you is to find the equation for all points whose distance to point (3, -2) is 4. 

We know that square of distance between point (x, y) and (3, -2) is 

{{{Distance^2 = (x-3)^2 + (y-(-2))^2}}}

The problem gives us distance as 4. 

So,

{{{(x-3)^2 + (y-(-2))^2 = 4^2}}} that's your answer