Multiple choice If a and b are negative integers, which of the following is the greatest? ab a3b a2 - b2 a2 + b2 a3 + b3 Reveal answer Fill a bubble to check yourself D Correct answer Explanation Let (a, b) be (-1, -2). Then (1) = 2, (2) = - 2, (3) = - 3, (4) = 5 and (5) = - 7. So (4) is greatest among all the choices, is the answer.