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 June 3rd, 2011, 11:17 AM #1 Newbie   Joined: Jun 2009 Posts: 28 Thanks: 1 Algebra question Hi, I need to know the value of the expression (3 - x)/(x + 3). I know that an expression such as (x - 3)/(3 - x) would equal -1, but I am not sure what the value of the prior expression would be. Thanks.
 June 3rd, 2011, 12:10 PM #2 Senior Member   Joined: Nov 2010 Posts: 288 Thanks: 1 Re: Algebra question Hello there, this expression doesn't have a certain value. I mean its value depends on the value of x. For example: for x=1 you have 1/2 for x=3 you have 0 for x=-2 you have 5 and so on .... best regards.
 June 3rd, 2011, 12:14 PM #3 Newbie   Joined: Jun 2011 Posts: 20 Thanks: 0 Re: Algebra question This expression doesn't have a fixed value; it can change while x is changing. There is one value of x where your expression doesn't exist and that is when x=-3 then you would have to divide by zero and that isn't possible. link: here you can see this function.
 June 3rd, 2011, 12:44 PM #4 Math Team   Joined: Apr 2010 Posts: 2,780 Thanks: 361 Re: Algebra question $\frac{x-3}{3-x}=-1 \cdot \frac{3-x}{3-x}=-1 \;\text{for}\; x \ne 3$ $\frac{3-x}{x+3}=\frac{6}{x+3}+\frac{-3-x}{x+3}=\frac{6}{x+3}-1$ is variable

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