(50-8次根号5)除以2次根号5
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:2024/07/10 15:43:36
(50-8次根号5)除以2次根号5
![(50-8次根号5)除以2次根号5](/uploads/image/z/3296760-24-0.jpg?t=%2850-8%E6%AC%A1%E6%A0%B9%E5%8F%B75%29%E9%99%A4%E4%BB%A52%E6%AC%A1%E6%A0%B9%E5%8F%B75)
/>(50-8根号5)÷2根号5
=50÷2根号5-8根号5÷2根号5
=5根号5-4
解法2:
(50-8根号5)÷2根号5
=(50-8√5)÷2√5
=(50-8√5)/2√5
=(50√5-8*5)/2*5 分子分母同时乘以√5
=(50√5-40)/10
=5√5 -4
=50÷2根号5-8根号5÷2根号5
=5根号5-4
解法2:
(50-8根号5)÷2根号5
=(50-8√5)÷2√5
=(50-8√5)/2√5
=(50√5-8*5)/2*5 分子分母同时乘以√5
=(50√5-40)/10
=5√5 -4