啊...不好意思...
看懂了...
其實我問的原因是...
我剛開到這題時想看題目怎麼解...
可是我又剛好在忙~
所以就複製下來放到TXT文字紋建檔裡面看~
但是-號不知道為什麼沒有出現~
所以我才看不懂...
抱歉了...
有點冒失...
aa2191943 寫到:#ed_op#DIV#ed_cl#我來舉一個例題:#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#問:化簡#ed_op#SUP#ed_cl#3#ed_op#/SUP#ed_cl#√(2#ed_op#STRIKE#ed_cl# #ed_op#/STRIKE#ed_cl#√5) + #ed_op#SUP#ed_cl#3#ed_op#/SUP#ed_cl#√(2+√5)#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#解:令x=#ed_op#SUP#ed_cl#3#ed_op#/SUP#ed_cl#√(2#ed_op#STRIKE#ed_cl# #ed_op#/STRIKE#ed_cl#√5) + #ed_op#SUP#ed_cl#3#ed_op#/SUP#ed_cl#√(2+√5)#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl# a=#ed_op#SUP#ed_cl#3#ed_op#/SUP#ed_cl#√(2#ed_op#STRIKE#ed_cl# #ed_op#/STRIKE#ed_cl#√5) b=#ed_op#SUP#ed_cl#3#ed_op#/SUP#ed_cl#√(2+√5)#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl# 所以x#ed_op#SUP#ed_cl#3#ed_op#/SUP#ed_cl#=[#ed_op#SUP#ed_cl#3#ed_op#/SUP#ed_cl#√(2#ed_op#STRIKE#ed_cl# #ed_op#/STRIKE#ed_cl#√5)]#ed_op#SUP#ed_cl#3 #ed_op#/SUP#ed_cl#+ [#ed_op#SUP#ed_cl#3#ed_op#/SUP#ed_cl#√(2+√5)]#ed_op#SUP#ed_cl#3 #ed_op#/SUP#ed_cl#+3ab(a+b)#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl# =(2#ed_op#STRIKE#ed_cl# #ed_op#/STRIKE#ed_cl#√5)+(2+√5)+3abx#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl# =4+3(-1)x#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl# 所以x#ed_op#SUP#ed_cl#3#ed_op#/SUP#ed_cl#+3x-4=0#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl# 解得x=1#ed_op#/DIV#ed_cl#