how can the process of applying the discounts one at a time be refleced in a single expression to represent the correct order

X^2 - 4x +(4/2^2) + y^2 + 8y + (8/2^2) = -4 + (4/2^2) + (8/2^2)(x + 2)^2 + (y + 4)^2 = -4 + 4 + 16your center is (-2, -4) and the radius is the sqrt of -4 + 4 + 16 which is 4

The answer is 10. and if you go by pemdas you would 1. multiplication 2. division 3. addition 4. subtraction