The solution set of x2 -4x-9 - 0 is

X^2 +4x+9 ≥ 0 ⇒ (x+2)^2+5 ≥ 0 ⇒ x ∈ℝ ...

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Inequality

The solution ...

Question

The solution set of $x^{2} + 4 x + 9 \geq 0$ is

ϕ (empty set)

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R

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[- 3, 4]

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[0, \infty)

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Solution

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