SOLUTION: f(-21/10)=13(-21/10)-26(-21/10)+14 i do not understand how to work this problem out i know answer is 12593/100... but how do you get to that?

Algebra ->  Functions -> SOLUTION: f(-21/10)=13(-21/10)-26(-21/10)+14 i do not understand how to work this problem out i know answer is 12593/100... but how do you get to that?      Log On


   

Question 293694: f(-21/10)=13(-21/10)-26(-21/10)+14
i do not understand how to work this problem out
i know answer is 12593/100...
but how do you get to that?
Found 2 solutions by stanbon, richwmiller:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
13(-21/10)-26(-21/10)+14
---------------------------------
13(-21/10)-26(-21/10)+(140/10)
-------------
-13(-21/10)+ 140/10
-----
= (273)/10 + (140/10)
---
= 133/10
================
Cheers,
Stan H.


Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
The other tutor Stan was good till here.
= (273)/10 + (140/10)
but he subtracted instead of added
413/10
41.3