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3 years ago

15

What is the solution to the inequality below? X^2>=81

1 answer:

kotegsom [21]3 years ago

7 0

Answer:

<em>A. x ≤ - 9 or x ≥ 9</em>

Step-by-step explanation:

<em>x² ≥ 81</em>

<em>| x | ≥ 9</em>

<em>x ≥ 0 => x ≥ 9 => x ∈ [ 9 ; + oo)</em>

<em>x < 0 => x ≤ - 9 => x ∈ ( -oo ; - 9 ]</em>

<em>x ∈ ( -oo ; - 9 ] ∪ [ 9 ; + oo)</em>

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