Mathematics · Functions and Inequalities
The function f(x) = x2 + 2x − 15x2 − 7x − 18 is negative if and only if:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1x < −5 or 3 < x < 9
- 2−5 < x < −2 or 3 < x < 9✓
- 3−2 9
- 4x < −5 or −2 < x < 3
Correct answer
−5 < x < −2 or 3 < x < 9
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