7. The roots of each of the following quadratic equations are real and equal, find k. (1) 3y^2 + ky + 12 = 0 ​

Question

7. The roots of each of the following quadratic equations are real and equal, find k.
(1) 3y^2 + ky + 12 = 0 ​

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Kinsley 4 days 2021-11-25T03:16:02+00:00 1 Answer 0 views 0

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    2021-11-25T03:17:47+00:00

    Answer:

    k= 12

    Step-by-step explanation:

    3y^2 + ky + 12 = 0

    => a = 3 , b = k and c= 12

    If the roots are real and equal

    b^2 – 4ac = 0

    => k^2 – 4 x 3 x 12 = 0

    => k^2 = 144

    => k= 12

    Hope this helps you

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