明明計到兩個答案，但係answer Key淨係話k=1 想問k點解唔可以係負數嘅🙏🙏🙏

2024-11-03 07:37

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發文後	用戶	內容
14 分鐘內	mint☘️ 63lyr1c	k係負數冇real root 題目given 咗條equation 有real root
2 小時內	bckh_795	When k = -14 Equation becomes x² + 5x + 20 = 0 The discriminant Δ = 5² - 4(1)(20) = -55 < 0 So there is no real roots for this equation That contradicts to the requirement of α and β being real numbers
3 小時內	Harry Lam harrylam2006	Bro睇題目唔該
5 小時內	HKDSE MATH & PHY TUTORIAL hs.education	5次方係好過份🤮
6 小時內	Gary gary.11_ng	Have real root,and it is positive value
9 小時內	Phy phy.thm	You must check the domain of k