Question 6
Let $a$ be real and $a^2-5a-1=0$. Compute $a^4-25a^2-10a+5$.
HKIMO 2026 THPT (Grades 10–12 shared) National Preliminary Set 02 Question 6
HKIMO · HKIMO 2026 THPT (Grades 10–12 shared) National Preliminary Set 02
HKIMO · HKIMO 2026 THPT (Grades 10–12 shared) National Preliminary Set 02