Factorise x^2-11x+18.

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

C) (x-2)(x-9)

Find two numbers with product 18 and sum -11: -2 and -9. So x^2-11x+18 = (x-2)(x-9). SLO M-09-A-18 · Understanding

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