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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