2√5-4)⼀(3-√5) 怎么化简成的 (√5-1)⼀2

2025-02-27 11:17:35
推荐回答(1个)
回答1:

(2√5-4)/(3-√5)
=(2√5-4)(3+√5)/[(3+√5)(3-√5)]
=(10+2√5-12)/(9-5)
=(2√5-2)/4
=(√5-1)/2