[問題] Solve 怎麼讓它只留實數解?
請問:
Solve[x^3+x^2-2==0,x]
它會把實數解跟複數解全部算出來:
{{x -> -1 - i}, {x -> -1 + i}, {x -> 1}}
要怎麼讓它只留實數解?? 像這樣:
{{x -> 1}}
謝謝
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