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Evgesh-ka [11]
3 years ago
15

Please answer it i really need help on this topic. 4 | -9x | - 1 > 35

Mathematics
2 answers:
Andrews [41]3 years ago
8 0
X>-1
:4 |-9x|-1>35
4|-9x|> 36
|-9x|>9
x>-1

Softa [21]3 years ago
6 0

Answer:

  (x < -1) ∪ (1 < x)

Step-by-step explanation:

Add 1, divide by 4, then resolve to two inequalities:

  4|-9x| -1 > 35

  4|-9x| > 36

  |-9x| > 9

For -9x > 0, this is ...

  -9x > 9

  x < -1 . . . . . divide by -9*

For -9x < 0, this is ...

  -(-9x) > 9

  x > 1 . . . . . divide by 9

The solution is ...

  (x < -1) ∪ (1 < x)

_____

* For inequalities, multiplying or dividing by a negative number reverses the sense of the comparison symbol. You can see this if you consider ...

  -2 < 1

  2 > -1 . . . both sides multiplied by -1

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