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    Mathematics
    Grade10
    Easy

    Question

    Find the product.  (x - 4)2

    1. x2 - 16
    2. x2 +8x -16
    3. x2 - 8x +16
    4. x2 + 4

    The correct answer is: x2 - 8x +16

      Using the pattern (a + b)2 = a2 + 2ab + b2
      (x + (-4))2 = x2 + 2cross timesxcross times(-4) + 16 = x2 – 8x + 16

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