Question

If x=4 is one root of the quadratic equation x²-4kx-6=0, then find the value of k

Answer 1

Hi

Here is your answer

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Answer:

                       k = - 5/8

Step-by-step explanation:

x² - 4kx - 6 = 0

Therefore,  x = 4

Substitute in that equation

4² - 4k4 - 6 = 0

16 - 164 - 6 = 0

10 - 16k = 0

-16k = 10

k = -10/16

k = - 5/8

k = - 0.625

Hope it helps U ....   :)

Answer 2

x²-4kx-6=0
(4²)-4k(4)-6=0
16-16k-6=0
16-16k=6
-16k=6-16
-16k=-10
k=-10/16
k=-5/8
Hope this help you
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