if a ( a + 2 ) = 99 and b ( b + 2 ) = 99 , where a ≠ b , then a + b =
"i . e . if a = 9 then b = - 11 or if a = - 11 then b = 9 but in each case a + b = - 11 + 9 = - 2 answer : a"
add(divide(99, const_10), divide(99, divide(99, const_10)))