Question 7
Real numbers $x,y$ satisfy $x^2+y^2+5=4x+2y$. Find $x-y$.
HKIMO 2026 THPT (Grades 10–12 shared) National Preliminary Set 04 Question 7
HKIMO · HKIMO 2026 THPT (Grades 10–12 shared) National Preliminary Set 04
HKIMO · HKIMO 2026 THPT (Grades 10–12 shared) National Preliminary Set 04