Answered

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Solve each quadratic inequality then test their interval of the inequality.
1. x² - x - 20 > 0
2. x² - 2x - 11 < 0
3. x²+ 9x + 14 > 0
4. r² - 10r + 16 > 0​​

Sagot :

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Answer:

1 . x < − 4 or x > 5

2 . 1 − 2 √ 3 < x < 1 + 2 √ 3

3 .x < − 7 or x > − 2

4. r < 2 or r > 8

Step-by-step explanation:

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