#ed_op#P#ed_cl#
---- 寫到:2r^2+6r^2-243=0 #ed_op#BR#ed_cl#makes me dizzy.... why can't i solve it
#ed_op#/P#ed_cl##ed_op#P#ed_cl#你的方式並沒錯... 但是..... 你 dizzy 了, 讓你在回覆提示網友時, "最高次項" 少了一次!#ed_op#/P#ed_cl##ed_op#P#ed_cl#r#ed_op#SUP#ed_cl#2#ed_op#/SUP#ed_cl# (2r + 3) = 243 ← 這一行展開, 移頂後, 應如下#ed_op#BR#ed_cl#2r#ed_op#SUP#ed_cl#3#ed_op#/SUP#ed_cl# + 3r#ed_op#SUP#ed_cl#2#ed_op#/SUP#ed_cl# - 243 = 0#ed_op#BR#ed_cl#(r#ed_op#SUP#ed_cl#2#ed_op#/SUP#ed_cl# + 6r + 27)(2r - 9) = 0#ed_op#/P#ed_cl##ed_op#P#ed_cl##ed_op#/P#ed_cl##ed_op#P#ed_cl##ed_op#/P#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl#