If the operation x is defined by a x b = (b - a)^2/a^2 for all numbers a and b, and a ≠ 0, then − 1 x (1 x − 1) =	Choose one
A) −1 B) 0 C) 1 D) 25 E) 29
On solving the inner bracket we get 4.   then we get equation as -1 x 4 where b=4 and a=-1   Answer 25
<result>D</result>
If the operation x is defined by a x b = (b - a)^2/a^2 for all numbers a and b, and a ≠ 0, then − 1 x (1 x − 1) =