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Math Help - Factoring ax + c

  1. #1
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    Factoring ax + c

    If you were to solve this 64y^2 - 9 would it be y=.375?

    What would this look like factored?
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  2. #2
    Super Member TheChaz's Avatar
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    Re: Factoring ax + c

    Solve?

    If you set it equal to zero, you have the difference of two squares equal to zero.

    Can you think of something that, when squared, equals 64y^2 ?
    Call that "a". Then "b" = 3.

    a^2 - b^2 = (a + b)( a - b)

    Setting this to zero and solving will give you two solutions.
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  3. #3
    Member sbhatnagar's Avatar
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    Re: Factoring ax + c

    You could also

    64y^2-9=0

    \implies 64y^2=9

    \implies 8y=\pm 3
    Last edited by sbhatnagar; December 17th 2011 at 05:57 AM.
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  4. #4
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    e^(i*pi)'s Avatar
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    Re: Factoring ax + c

    Quote Originally Posted by britth View Post
    If you were to solve this 64y^2 - 9 would it be y=.375?

    What would this look like factored?
    Solve what - it needs to be equal to something (probably 0 since that does give your answer)

    Use the difference of two squares as TheChaz suggested to factor it
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