Question

if discriminate of equation is 2x square -kx-4=0 find k​

Answer 1

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Answer 2

Answer:

d = b^2 - 4ac = 0

k^2 - 4×2×(-4) = 0

k^2 + 32 = 0

k^2 = -32

k = $\sqrt{ - 32} = 4 \sqrt{2} i$

Where 'i' is imaginary number i = $\sqrt{-1}$