If the operation ∆ is defined by a ∆ b = (b - a)^2/a^2 for all numbers a and b, and a ≠ 0, then what is the result when we evaluate this expression: (-2) ∆ (2 ∆ −2) ? Select the correct option:
A) −1
B) 0
C) 1
D) 9
E) 25
(-2) ∆ (2 ∆ − 2) =   (-2) ∆ (4^2/2^2) =   (-2) ∆ (4) =   (-6^2) / (-2)^2 = 9   The answer is 9.
<result>D</result>
If the operation ∆ is defined by a ∆ b = (b - a)^2/a^2 for all numbers a and b, and a ≠ 0, then what is the result when we evaluate this expression: (-2) ∆ (2 ∆ −2) ?