SOLUTION: Find f(x - 2) when f(x) = 2x

SOLUTION: Find f(x - 2) when f(x) = 2x - 5 over 3x + 4

Question 597453: Find f(x - 2) when f(x) =
2x - 5
over
3x + 4
Found 2 solutions by stanbon, unlockmath:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Find f(x - 2) when f(x) =
2x - 5
over
3x + 4
==============
f(x) = (2x-5)/(3x+4)
----
f(x-2) = (2(x-2)-5)/(3(x-2)+4)
---
= (2x-4-5)/(3x-6+4)
---
= (2x-9)/(3x-2)
===================
Cheers,
Stan H.
===================
Answer by unlockmath(1688) (Show Source): You can put this solution on YOUR website!
Hello,
Let's write it as this: f(x - 2) when f(x)=(2x - 5)/(3x+4)
Now substitute (x-2) for each x:
f(x) =(2(x-2)-5)/(3(x-2) + 4)
Expand this and combine like terms to get:
f(x)=(2x-9)/(3x-2)
Make sense?
RJ
www.math-unlock.com
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