Verified answer

2 - 6x - 3(3 + 2x) ≥ 5

(x + 2)² ≤ x² - 6x + 20

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2 - 6x - 9 - 6x ≥ 5

x² + 4x + 4 ≤ x² - 6x + 20

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12x ≤ -12

10x ≤ 16

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x ≤ -1

x ≤ 1.6

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x ∈ (-∞, -1]