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Math Help - Restrictions on variables part two

  1. #1
    Junior Member
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    Restrictions on variables part two

    for the question (x^3-3x^2+4x-12) / (y^2+3)
    i found the answer to be x-3

    the book states that there are no restrictions for this question
    is this right?
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  2. #2
    Senior Member slevvio's Avatar
    Joined
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    Yes that is right, look at the denominator again:  y^{2} + 3 .

    A square term is always greater than or equal to zero.
    And therefore a square term + a positive number must be greater than zero.
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