1. 2y-1/y + 2x-1/x
2. 2a+2/a2+4a+3 + 2/a+1
3. 2x-1/x+3 - x+1/x-3
4. 2/r2+r - 3/r+1
Questions:
How did you find the LCD of the unlike expressions above?
What factoring techniques did you use to factor the denominator of Item 2?