Question

For what value of k, the roots of the equation x²+ 4x + k = 0 are real?
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Answer 1

For real roots:-

$d = {b}^{2} - 4ac = 0 \\ {(k)}^{2} - 4(1)(k) = 0 \\ {k}^{2} - 4k = 0 \\ k(k - 4) = 0$

Answer 2

Answer:

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