if a ( a + 2 ) = 120 and b ( b + 2 ) = 120 , where a ≠ b , then a + b =
"i . e . if a = 10 then b = - 12 or if a = - 12 then b = 10 but in each case a + b = - 12 + 10 = - 2 answer : c"
add(divide(120, const_10), divide(120, divide(120, const_10)))