SOLUTION: perform the idicated operation by using the LCD and simplify the result. 5x 3x ____ _ ______ x-7 7-x

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: perform the idicated operation by using the LCD and simplify the result. 5x 3x ____ _ ______ x-7 7-x      Log On


   

Question 427759: perform the idicated operation by using the LCD and simplify the result.
5x 3x
____ _ ______
x-7 7-x
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
perform the indicated operation by using the LCD and simplify the result.
%285x%29%2F%28x-7%29 - %283x%29%2F%287-x%29
On the 2nd denominator we can factor out -1,
%285x%29%2F%28x-7%29 - %283x%29%2F%28-1%28x-7%29%29
then - 1 changes the sign to
%285x%29%2F%28x-7%29 + %283x%29%2F%28x-7%29
Now the denominators are the same so we have
%285x+%2B+3x%29%2F%28x-7%29 = %288x%29%2F%28x-7%29, is the simplified expression