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AIMO 2021 Secondary 3 — Preliminary (Open Trial 1) Question 10

AIMO · AIMO 2021 Secondary 3 — Preliminary (Open Trial 1)

Question 10

Solve $|x^2-4x-13|<8$.
  1. $-3<x<-1$
  2. $5<x<7$
  3. $-3<x<-1$ or $5<x<7$
  4. $1<x<3$ or $5<x<7$