# SOLUTION: I forgot how to do these. Can you please help. I believe you start with finding the common denomitor but I get lost after that. xyz^0 - 7x^2y^2 + 2x^3x^-2yz^-2 + 5xy^-1y^0 --

Algebra ->  Algebra  -> Polynomials-and-rational-expressions -> SOLUTION: I forgot how to do these. Can you please help. I believe you start with finding the common denomitor but I get lost after that. xyz^0 - 7x^2y^2 + 2x^3x^-2yz^-2 + 5xy^-1y^0 --      Log On

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 Algebra: Polynomials, rational expressions and equations Solvers Lessons Answers archive Quiz In Depth

 Question 68547This question is from textbook Saxon Algebra 1 : I forgot how to do these. Can you please help. I believe you start with finding the common denomitor but I get lost after that. xyz^0 - 7x^2y^2 + 2x^3x^-2yz^-2 + 5xy^-1y^0 ----- ------- ------------- --------- z xyz z^-1x^0 zy^-2 is the common denominator x^2y^2z thank youThis question is from textbook Saxon Algebra 1 Answer by stanbon(57246)   (Show Source): You can put this solution on YOUR website!xyz^0 - 7x^2y^2 + 2x^3x^-2yz^-2 + 5xy^-1y^0 ----- ------- ------------- --------- z xyz z^-1x^0 zy^-2 --------------------------------- I would first of all try to simplify the problem, as follows: ------------ [xy/z] - [7xy/z] + [2xy/z] + [5xy/z] ------------- Now you see the common denominator is "z" and each fraction has the same denominator so we can add the numerators and write the sum over z as follows: ------------------------- = [xy-7xy+2xy+5xy]/z =[xy]/z Cheers, stan H.