if a ( a - 4 ) = 12 and b ( b - 4 ) = 12 , where a ≠ b , then a + b =
i . e . if a = 6 then b = - 2 or if a = - 2 then b = 6 but in each case a + b = - 2 + 6 = 4 answer : option c
subtract(subtract(subtract(subtract(add(add(4, 12), subtract(4, 12)), const_1), const_1), const_1), const_1)