Posted by **Anonymous** on Tuesday, September 8, 2009 at 2:45pm.

True or false:

a. |3x-5|=|2x+4| if and only if 3x-5=2x+4 or 3x-5= -(2x+4) ______

b. |2x+7|=-4 if and only if 2x+7=4 or 2x+7=-4 ______

how do you do these and what's the answer?

thanks

- pre calc -
**bobpursley**, Tuesday, September 8, 2009 at 3:06pm
b. How can abs () ever be negative?

a. Isn't that the definition of what happens in an abs function?

- pre calc -
**Anonymous**, Tuesday, September 8, 2009 at 3:09pm
but is it true or false?

- pre calc -
**Anonymous**, Tuesday, September 8, 2009 at 3:17pm
The abs are || and the () are parantheses

- pre calc -
**bobpursley**, Tuesday, September 8, 2009 at 3:32pm
You have to do your own thinking. I gave you the answer. If something is the definition, it must be true.

Online, absolute function is written abs(xxxx) where xxxx is the argument.

Wasn't this a summer assignment, due in the upcoming week?

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