AM-303

Discriminant and nature of roots

A Math · Secondary 3 · Hard · Discriminant and nature of roots

1. $\dfrac{3-\sqrt{57}}{8}<k<\dfrac{3+\sqrt{57}}{8}$
2. $k>\dfrac{3+\sqrt{57}}{8}$
3. $k<\dfrac{3-\sqrt{57}}{8}$
4. $k>-1$

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