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1 January, 16:10

Factor Completely: 25x2 - 64 A) 5 (x - 8) (x + 8) B) 5 (x - 8) (x - 8) C) (5x - 8) (5x + 8) D) (25x - 1) (x + 64)

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  1. 1 January, 16:27
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    Rewrite it in the form a^2 - b^2, where a = 5x and b = 8

    (5x) ^2 - 8^2

    Use the Difference of Squares; a^2 - b^2 = (a + b) (a - b)

    = C. (5x - 8) (5x + 8)
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