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Math Help - Like terms?

  1. #1
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    Like terms?

    Quick question with the following addition
    <br />
\frac{1(x-1)+1(x+2)}{(x+2)(x+3)(x-1)}=\frac{2x+1}{(x+2)(x+3)(x-1)}

    How are we able to combine the numerators in this case to produce 2x + 1? Usually when dealing with variables you are adding or subtracting like terms, but here I dont see it, if present.

    Thanks
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  2. #2
    Super Member malaygoel's Avatar
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    1(x-1)+1(x+2)
    = x-1+x+2
    Collect like terms
    = x+x-1+2
    = 2x+1
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  3. #3
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    Bah im blind tonight, thanks!
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