1.

If one root of quadratic equation x²+kx-8=0 is -4 then the value of k

Answer»

Answer:

x = -4

x²+kx-8=0

(-4)² + k(-4) - 8 = 0

16 -4K -8 = 0

-4k + 8 = 0

4k = 8

k = 2

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