Which two numbers add up to three and multiply by one ··Little friends don't understand·········

Which two numbers add up to three and multiply by one ··Little friends don't understand·········

(1) xy = 1. (2) for the deformation of (1), y = 3-x is introduced into the equation 2x (3-x) = LX & # 178; - 3x + 1 = 0x = (3 + √ 5) / 2, or x = (3 - √ 5) / 2. Therefore, when x = (3 + √ 5) / 2, y = (3 - √ 5) / 2 is obtained by introducing it into equation 1, and when x = (3 - √ 5) / 2, y = (3 - √ 5) / 2 is obtained