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HKIMO 2026 THPT (Grades 10–12 shared) National Preliminary Set 03 Question 10

HKIMO · HKIMO 2026 THPT (Grades 10–12 shared) National Preliminary Set 03

Question 10

If $2x^3+ax^2+bx+3$ is divisible by $2x^2+x-1$, find $a+b$.
  1. $-6$
  2. $-4$
  3. $-9$
  4. $-5$