// Setup
function abTest(a, b) {
// Only change code below this line
if(a<0){
  return undefined;
}
else if(b<0){
  return undefined;
}
// Only change code above this line
return Math.round(Math.pow(Math.sqrt(a) + Math.sqrt(b), 2));
}
// Change values below to test your code
abTest(-2,2);