Here x and y are two numbers whose sum is 2 and product is -15. A useful HSC-level trick is to think of them as roots of the quadratic equation t² - (2)t + (-15) = 0. After factoring or solving that quadratic, we get the two possible numbers. Since the question asks for ordered pairs, the order matters: if the two numbers are different, both (first, second) and (second, first) are valid. Checking the selected pair(s), each one has sum 2 and product -15. Therefore the correct answer choices are (-3, 5), (5, -3).