See this example:

We multiply both sides by

and get:

Criteria 1:

x < -1

but since we get

Criteria 2:

why less or equal??

from that we get: (why not (-1, -2+\sqrt{5}] ?)

Criteria 3:

x > 1

All together:

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- Dec 14th 2009, 01:09 PMmetlxSolving inequality
See this example:

We multiply both sides by

and get:

Criteria 1:

x < -1

but since we get

Criteria 2:

why less or equal??

from that we get: (why not (-1, -2+\sqrt{5}] ?)

Criteria 3:

x > 1

All together:

- Dec 14th 2009, 02:17 PMNOX Andrew
If , then is negative.

- Dec 14th 2009, 02:51 PMmetlx
short and simple. thanks :)