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simplify. what are the excluded values?

  • math -

    There is a good chance you have missed out parentheses in the numerator and the denominator.

    All fractions have implicit (i.e. understood) parentheses in the numerator and denominator.

    I believe your question means
    (x²+6x+9)/(5x+15) even though the question does not actually show the brackets. When you reduce the expression to a single line, the parentheses are required.

    =(x+3)/5 on condition that x≠3

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