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why b^2 – 4ac is called the discriminant of quadratic equation

    • Posted by Hanshika (Honey) 4 years, 2 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Gaurav Seth 4 years, 2 months ago

    (b2 – 4ac) is called the discriminant of the quadratic equation ax2 + bx + c = 0. Its value determines the nature of roots 

    It is called the Discriminant, because it can "discriminate" between the possible types of answer: when b2 − 4ac is positive, we get two Real solutions. when it is zero we get just ONE real solution (both answers are the same) when it is negative we get a pair of Complex solutions. 

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