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28 September, 08:49

What shows 23^2-17^2 being evaluated using the difference of perfect squares method

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Answers (2)
  1. 28 September, 08:50
    0
    Remember

    a²-b² = (a-b) (a+b)

    so

    23²-17² = (23-17) (23+17) = (6) (40) = 240
  2. 28 September, 08:58
    0
    23^2 - 17^2

    = (23-17) (23+17)

    = 6 * 40

    = 240
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