Adding and Subtracting Rational Expressions plz help quick 10 points!!!!?

R

Renee

New member
5.x^2+2x/12x+54 - 3-x/8x+36


6.2/x^2+8x+15 + 1/x^2+11x+30

7. Using complete sentences, explain why it is necessary to have common denominators when adding or subtracting rational expressions


please show work so i understand how you got the answer thanks!!!!!!
 
http://www.mathway.com/problem.aspx?p=algebra?p=twiceSMB15theSMB15differenceSMB15ofSMB15xSMB15andSMB154SMB15isSMB15-25?p=5000?p=error

I promise you this site will give you the answers, the only thing is you would have to sign up if you wanted to see them work it out.
 
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