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Factor completely. x^2-4

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  1. 9 May, 22:37
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    (x - 2) (x + 2).

    Step-by-step explanation:

    This is the difference of 2 squares:

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

    So

    x^2 - 4 = (x - 2) (x + 2).
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