181^2-61^2/301^2-181^2是多少?_数学解答

181^2-61^2/301^2-181^2是多少?

人气：154 ℃　时间：2020-06-11 09:23:48

解答

(181?-61?)/(301?-181?) =[(181+61)(181-61)]/[(301+181)(301-181)] =(242×20)/(482×120) =121/1446