Skip to content / Đến nội dung
ThichHocToan.com

IMC 2006 — Keystage 3 (IWYMIC) — individual Question 9

xIMC · IMC 2006 — Keystage 3 (IWYMIC) — individual

Question 9

For real $x,y$, $(2x+1)^2+y^2+(y-2x)^2=1/3$. Find $x+y$.