What is meant by saying nature of roots of quadratic equation ?

Answers (1)

The discriminant determines the nature of the roots of a quadratic equation. The word ‘nature’ refers to the types of numbers the roots can be — namely real, rational, irrational or imaginary. 

If the discriminate is 0, then the roots are equal
If the discriminate is positive, the the roots are real and unequal
If the discriminate is negative, the roots are imaginary

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