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  • Quadratics (again; please help!)

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    1. Community
    2. Study Group

    I don't understand how this:    3 ± 3√17 ________     -12   Simplifies into this:     1 ±√17 ________      -4  

  • Completely Simplifying Quadratics

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    1. Community
    2. Study Group

    This was listed as the final answer for a Quadratic Equation: So, why did they not simplify this further (to -1/-2)?  I thought you were supposed to.  Will it not be the same answer?  As long as it...

  • Order of Operations

    Beantwortet
    1. Community
    2. Study Group

    I thought addition came before subtraction. Also, how do you know where to put parentheses when there are none in the equation already?  Surprisingly, I think that Order of Operations is one of the...

  • Imaginary Numbers

    Beantwortet
    1. Community
    2. Study Group

    I have a question--sometimes the answer to the square root of an imaginary number will just be written in positive form with an i, but other times, it will be written like this (ex): 2√−4.  When do...

  • What does -∞ mean? (negative infinity?)

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    1. Community
    2. Study Group

    When I was practicing limits, the answer to one of the questions was -∞.  Does this mean ¨negative infinity¨?  What does ¨negative infinity¨ mean? 

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