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**1. Find the discriminant of the following given quadratic equations.**

**2. Find the nature of roots of the following given quadratic equations and verify the result it by solving the equation.**

**3. For what value of k, the expression.**

**4. Find the value of k, if the roots of the following equation are equal.**

**5. Show that the equation….. has equal roots, if……..**

**….Cube roots of Unity and their Properties…**