Question

If ½ is one of the roots of x² +kx- ⅝=0 then the value of k is *

1 point

1/4

1/8

3/4​

Answer 1

Answer:

Step-by-step explanation:

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Answer 2

Answer:

Putting ½ in equation

${( \frac{1}{2}) }^{2} + k \times \frac{1}{2} - \frac{5}{8} = 0 \\ \frac{1}{4} + \frac{k}{2} - \frac{5}{8} = 0 \\ \frac{2 + 4k - 5}{8} = 0 \\ 4k - 3 = 0 \\ k = \frac{3}{4} \: \: \: ans.$