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7.For what value of k, the roots of the equation x² + 4x + k = 0 are real. |
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Answer» 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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