multiply rational expression

G

Guest

Guest
Couple more and I am done for the day.

x-1 over 3 * 9 over 1-x

Our book shows to factor out 9

x-1 3*3
3 1-x

This allows me to cancel out one set of 3.

x-1 3
1-x

I am not sure how to proceed now.
 
Code: 
 x - 1      9
------ * -------
   3       1 - x
You have correctly said to cancel out the 3 by dividing 9 by it.

So we have
Code: 
3(x - 1)
--------
 1 - x
What do you think we can do to turn that (x-1) into a (1-x) to get some cancellation? Hint: bring out a factor of ___.
 
How did you get x-1 on both? If this is the case I could cancel them out and end up with 3 as an answer, but I don't understand where you got them.

I have x-1 and 1-x I know x is the same as 1, but can you flip them like that?
 
You must log in or register to reply here.
Top