这条算式的答案是甚么?
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/06/22 13:23:36
这条算式的答案是甚么?
(a-4)^2+[3/4(a-4)]^2
(a-4)^2+[3/4(a-4)]^2
![这条算式的答案是甚么?](/uploads/image/z/20292275-11-5.jpg?t=%E8%BF%99%E6%9D%A1%E7%AE%97%E5%BC%8F%E7%9A%84%E7%AD%94%E6%A1%88%E6%98%AF%E7%94%9A%E4%B9%88%3F)
(a-4)^2+[3/4(a-4)]^2=25/16(a-4)^2=(5a/4-5)^2
再问: 为甚么是25/16而不是9/16?
再答: (a-4)^2+[3/4(a-4)]^2=(1+9/16)(a-4)^2=25/16(a-4)^2=(5a/4-5)^2
再问: 3/4为甚么变了1+9/16?1从何而来? 对不起我数学很差,谢谢你!
再问: 为甚么是25/16而不是9/16?
再答: (a-4)^2+[3/4(a-4)]^2=(1+9/16)(a-4)^2=25/16(a-4)^2=(5a/4-5)^2
再问: 3/4为甚么变了1+9/16?1从何而来? 对不起我数学很差,谢谢你!