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20 November, 11:57

Factor binomial - 16r^2+1

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Answers (2)
  1. 20 November, 14:24
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    -16r^2+1

    = 1 - 16r^2

    = (1 + 4r) (1 - 4r)
  2. 20 November, 15:51
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    I'd suggest you write - 16r^2+1 in the equivalent form 1-16r^2. This makes clearer the fact that - 16r^2+1 is the difference of 2 squares.

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

    so 1-16r^2 = (1-4r) (1+4r) (answer)
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