Question 13
How many positive integers $x$ make $\sqrt{x^2-22x+221}$ an integer?
HKIMO 2017 THPT (Grades 10–12 shared) National Final (Heat) Set 04 Question 13
HKIMO · HKIMO 2017 THPT (Grades 10–12 shared) National Final (Heat) Set 04
HKIMO · HKIMO 2017 THPT (Grades 10–12 shared) National Final (Heat) Set 04