Question 15
Real numbers $x,y$ satisfy $x-y=6$ and $x^2+y^2=40$. Find $2x^3-2y^3$.
HKIMO 2026 THPT (Grades 10–12 shared) National Preliminary Set 04 Question 15
HKIMO · HKIMO 2026 THPT (Grades 10–12 shared) National Preliminary Set 04
HKIMO · HKIMO 2026 THPT (Grades 10–12 shared) National Preliminary Set 04