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1. x2-9x+20

  • A. (x+5) (x+4)
  • B. (x+5) (x+4)
  • C. (x+5) (x+4)
  • D. (x+5) (x+4)

Answer: Option B

Explanation:

x2-9x+20=x2-5x-4x+20=xx-5-4x-5=x-5x-4

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