You multiply -4 to everything inside of the parenthesis which is 20w+12u-8
Answer:
The answer is

Step-by-step explanation:
Plug in and solve the equation. We are trying to find the y-intercept:

We found the y-intercept, so now we plug it in it's right full spot in the formula.

Equation of a circle:
(x - h)^2 + (y - k)^2 = r^2
where (h,k) is the center and r = radius
(x - 3)^2 + (y + 2)^2 = 25