SOLUTION: Could someone please help me solve this expression in simplest form? {{{(3)/(x^2+4x+3)}}}-{{{(1)/(x^2-9)}}} I am having trouble doing the subtractions of equations.

Algebra ->  Algebra  -> Polynomials-and-rational-expressions -> SOLUTION: Could someone please help me solve this expression in simplest form? {{{(3)/(x^2+4x+3)}}}-{{{(1)/(x^2-9)}}} I am having trouble doing the subtractions of equations.      Log On

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

 Question 93268: Could someone please help me solve this expression in simplest form? - I am having trouble doing the subtractions of equations.Answer by kev82(148)   (Show Source): You can put this solution on YOUR website!Hi, Just like normal fractions, with algebraic fractions you need to have a common denominator. When lookig for one, I suggest factorising as much as you can. and The lowest common denominator is going to be . So we have to multiply the first fraction by and mutiply the second one by . This leaves us with: . Can you do the subtraction now? Make sure you check your answer by putting some values into it and checking it is what it should be. Kev