If 4 is a root of quadratic equation x2 +ax -8 =0, then a = ______ a. -2 b. 2 c. 3

Question

If 4 is a root of quadratic equation x2 +ax -8 =0, then a = ______

a. -2

b. 2

c. 3

d. -3​

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Natalia 10 hours 2021-10-12T13:52:01+00:00 1 Answer 0 views 0

Answers ( )

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    2021-10-12T13:53:32+00:00

    Answer:

    Answer is – 2

    Step-by-step explanation:

    By putting the value of the x as 4

    4 square +a(4)-8=0

    16+4a-8=0

    8+4a=0

    8=-4a

    a=-2

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