2/3√20 乘以 (-√15)÷(-3/1√48)怎么做啊
问题描述:
2/3√20 乘以 (-√15)÷(-3/1√48)怎么做啊
答
3/2*√20 乘以 (-√15)÷(-√48/3)
=3√5*√15÷4√3/3
=15√3x3/4√3
=45/4