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Question
Choose the correct alternative:
If a and b are the real roots of the equation x2 − kx + c = 0, then the distance between the points (a, 0) and (b, 0) is
Options
`sqrt("k"^2 - 4"c")`
`sqrt(4"k"^2 - "c")`
`sqrt(4"c" - "k"^2)`
`sqrt("k" - 8"c")`
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Solution
`sqrt("k"^2 - 4"c")`
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