tolong dibantuiin dong

hp {10/3,√20/√0,09}

maaf kalau salah

-x + 2y = 0 => x = 2y

x^2 + y^2 = 20
(2y)^2 + y^2 = 20
4y^2 + y^2 = 20
5y^2 = 20
y^2 = 4
y = 2 atau y = -2
y = 2 => x = 2y = 2(2) = 4
y = -2 => x = 2(-2) = -4
HP = {(4, 2), (-4, -2)}