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ITMC 2018 Grade 8 National Preliminary set01 Question 2

ITMC · ITMC 2018 Grade 8 National Preliminary set01

Question 2

Which polynomial equals $(x+20)(x+18)$?
  1. $x^2+38x+360$
  2. $x^2-38x+360$
  3. $x^2+38x-360$
  4. $-x^2+38x-360$
  5. $x^2-38x-360$