→ gamlty99 : 感謝 05/27 20:45
公式解
x=(-b±sqrt(b^2-4ac))/(2a)
=(-1±sqrt(5))/2
=黃金數(大誤)
※ 引述《gamlty99 (548+9)》之銘言：
: 請問 x^2 + x - 1= 0
: 要用何種方式求解
: 無法因式分解
: 突然忘記要怎麼求解XD
: 答案有根號
: 謝謝
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