7.
For what value of k, the roots of the equation x² + 4x + k = 0 are real.
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Answer:
The value of k must be less than or equal to 4.
Step-by-step explanation:
The given quadratic equation is
A quadratic equation has real roots if
We have,
Divide both sides by 4.
Therefore the value of k must be less than or equal to 4.
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