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: (-4) ∆ (4 ∆ −4) ?
Choose the correct choice from the following answers:
A) 2
B) 4
C) 6
D) 8
E) 10
(-4) ∆ (4 ∆ −4) =   (-4) ∆ (8^2/4^2) =   (-4) ∆ (4) =   (-8^2) / (-4)^2 = 4   The answer is 4.
<result>B</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: (-4) ∆ (4 ∆ −4) ?