The solution of the inequality by method of interval is x = [5,∝) and x = [-2,0]∪[8,-∝).
What is the solution of the given inequality problems ?
The first inequality is (x² - 25)/(x + 10) ≥ 0
⇒ x² - 25 ≥ 0
⇒ x² ≥ 25
∴ x ≥ 5
Thus the domain of the given inequality from method of interval is x = [5,∝).
The second inequality is (x + 2)(x² - 64)/(x² + 45) ≤ 0
⇒ (x + 2)(x² - 64)≤ 0
Either (x + 2)≤ 0 or (x² - 64)≤ 0
Either x ≤ -2 or x ≤ 8
Thus , the combined domain of the given inequality from method of interval is x = [-2,0]∪[8,-∝) .
Therefore, the solution of the inequality by method of interval is x = [5,∝) and x = [-2,0]∪[8,-∝).
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