8 - 7x - x² ≥ 0 x + 5 ≠ 0
x₁ = 8 x ≠ -5
x₂ = -1
-1 ≤x ≤ 8
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8 - 7x - x² ≥ 0 x + 5 ≠ 0
x₁ = 8 x ≠ -5
x₂ = -1
-1 ≤x ≤ 8