4) What is the value of discriminant for the quadratic equation X2 – 2X – 3

= 0?

A) -16. B) 16 C) 8 D

Question

4) What is the value of discriminant for the quadratic equation X2 – 2X – 3

= 0?

A) -16. B) 16 C) 8 D) 4​

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Samantha 3 months 2021-07-24T13:56:53+00:00 1 Answers 0 views 0

Answers ( )

    0
    2021-07-24T13:58:35+00:00

    Answer:

    option (B) 16

    Step-by-step explanation:

    Given :

    The quadratic equation : x² – 2x – 3

    To find :

    the value of discriminant

    Solution :

    For the quadratic equation of the form ax² + bx + c, the value of discriminant is given by

    D = b² – 4ac

    For the given Quadratic equation,

    a = 1

    b = –2

    c = –3

    Discriminant, D = (–2)² – 4(1)(–3)

    D = 4 + 12

    D = 16

    Therefore, correct option is (B)

    ________________________

    #Know more :

    • The nature of roots is based on the value of discriminant.

    D > 0 ; the quadratic equation has real and distinct roots

    D = 0 ; the quadratic equation has real and equal roots

    D < 0 ; the quadratic equation has complex roots

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