Question
If the roots of the equation x² + 5x + k = 0 are real
and equal, find the value of k.Solution
For real and equal roots, the discriminant must be zero: D = b² - 4ac = 0 5² - 4(1)(k) = 0. Thus, k = 25/4 = 6.25. Correct answer : a) 6.25
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