46/91*46/91+45/91*45/91-46/91*45/91-45/91*44/91怎样简算

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/30 04:48:00
46/91*46/91+45/91*45/91-46/91*45/91-45/91*44/91怎样简算

46/91*46/91+45/91*45/91-46/91*45/91-45/91*44/91怎样简算
46/91*46/91+45/91*45/91-46/91*45/91-45/91*44/91怎样简算

46/91*46/91+45/91*45/91-46/91*45/91-45/91*44/91怎样简算
46/91*46/91+45/91*45/91-46/91*45/91-45/91*44/91
=(46/91)^2+(45/91)^2-46/91*45/91+46/91*45/91-46/91*45/91-45/91*44/91
=(46/91-45/91)^2+46/91*45/91-45/91*44/91
=(1/91)^2+[45*(46-44)]/91*91
=1/91*91+90/91*91
=91/91*91
=1/91