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Math Help - factor

  1. #1
    No one in Particular VonNemo19's Avatar
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    factor

    could someone show me how to factor

    x^2-4
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  2. #2
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    e^(i*pi)'s Avatar
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    Quote Originally Posted by VonNemo19 View Post
    could someone show me how to factor

    x^2-4
    Difference of two squares - Wikipedia, the free encyclopedia

    This is a common type of quadratic and you can use the identity in the link above:

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

    In your case it is easy enough to see that x=a and 2=b
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  3. #3
    No one in Particular VonNemo19's Avatar
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    so what's the answer
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  4. #4
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    e^(i*pi)'s Avatar
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    Quote Originally Posted by VonNemo19 View Post
    so what's the answer
    (x-2)(x+2)
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