If $x^2+bx+16$ has at least one real root, find all possible values of $b$. Express your answer in interval notation.
Question:
If $x^2+bx+16$ has at least one real root, find all possible values of $b$. Express your answer in interval notation.
Answer:
Let's think step by step.

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(-\infty,-8]\cup [8,\infty)
If $x^2+bx+16$ has at least one real root, find all possible values of $b$. Express your answer in interval notation.
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