Posted by lindsay on Thursday, December 13, 2012 at 3:47pm.
Calculat the absolute value of:
4{x3}=0
PS. The brackets are supposed to be the straight lines for the absolute symbols.

math  Steve, Thursday, December 13, 2012 at 3:51pm
who are all these people that can't find the "" key? It's shift\ on every keyboard I've seen.
4x3 = 0
if (x3) > 0, x3 = x3 and we have
4(x3) = 0
4x+3 = 0
7x = 0
x = 7
if (x3) < 0, x3 = (x3) = 3x
4(3x) = 0
1+x = 0
x = 1
Note that sometimes there are unusable solutions, as in some case where you have
if (x+3) > 5
and you end up with a "solution" of x = 2
which does not satisfy the condition.
In this problems, the solutions obeyed the conditions.

math  Joey, Thursday, December 13, 2012 at 3:52pm
In order to void the absolute value bars, it needs to stand by itself.
So 4=x3
Now get rid of the value bars and you get:
7 = x
Plug it in and see !
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