Factorise x^3 - 64.

  1. (x - 4)^3
  2. (x - 4)(x^2 - 4x + 16)
  3. (x + 4)(x^2 - 4x + 16)
  4. (x - 4)(x^2 + 4x + 16)
Answer

D) (x - 4)(x^2 + 4x + 16)

a^3 - b^3 = (a - b)(a^2 + ab + b^2) with a = x, b = 4. SLO M-09-A-18 · Understanding

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