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17 May, 17:29

64x ^2-81 what's the answer?

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Answers (2)
  1. 17 May, 17:30
    0
    (8x+9) (8x-9)

    Step-by-step explanation:

    64x^2 = 8x*8x

    -81 = 9*-9
  2. 17 May, 17:32
    0
    (8x-9) (8x+9)

    Step-by-step explanation:

    64x^2 - 81

    Rewriting

    (8x) ^2 - 9^2

    We recognize that this is the difference of squares

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

    (8x-9) (8x+9)
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