Yahoo Answers: Answers and Comments for College algebra homework help?? [Homework Help]
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From olayda
enUS
Fri, 17 Jan 2020 22:57:47 +0000
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Yahoo Answers: Answers and Comments for College algebra homework help?? [Homework Help]
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From hayharbr: To be less than zero, either the top is negati...
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Sat, 18 Jan 2020 00:03:42 +0000
To be less than zero, either the top is negative while the bottom is positive, or vice versa.
Case 1:
top positive when x > 3
bottom negative when 5 < x < 7 so those together give 3 < x < 7
case 2:
top negative when x < 3
bottom positive when x > 7 or x < 5 so those together give x < 5
Answer: x < 5 or 3 < x < 7
Interval notation: (∞, 5) U (3,7)