SOLUTION: What is th indicated operation here and how do I do it for this problem? 7x / (x + 3) + 90 / (x^2 – 9) - 5x / (x – 3)

Algebra ->  Equations -> SOLUTION: What is th indicated operation here and how do I do it for this problem? 7x / (x + 3) + 90 / (x^2 – 9) - 5x / (x – 3)      Log On


   

Question 311349: What is th indicated operation here and how do I do it for this problem?
7x / (x + 3) + 90 / (x^2 – 9) - 5x / (x – 3)
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
same common denominator opperation
right off the bat you should notice theres an x+3 x-3 and those two multiplied together make x^2-9 so the common denominator is x^2-9
%28%287x%28x-3%29%29%2B90-%285x%28x%2B3%29%29%29%2F%28x%5E2-9%29
%287x%5E2-21x%2B90-5x%5E2%2B15x%29%2F%28x%5E2-9%29
%282x%5E2-6x%2B90%29%2F%28x%5E2-9%29
%282%28x%5E2-3x%2B45%29%29%2F%28x%5E2-9%29