Mathematics
Grade10
Easy

Question

Factors -3x3 + 18x2 – 27x

  1. 3x (x + 3)2
  2. -3x (x – 3)2
  3. (3x – 9)2
  4. (3x + 9)2

The correct answer is: -3x (x – 3)2


    Take out -3x,
    -3x (x2 – 6x + 9) = -3x (x2 – 2(x)(3) + 32) = -3x (x – 3)2

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