(X-2)^2+(2x-6)^2=10^2 dengan cara mengkuadratkan bilangan

(x - 2)² + (2x - 6)² = 10²
x² - 4x + 4 + 4x² - 24x + 36 - 100 = 0
5x² - 28x - 60 = 0
a = 5
b = -28
c = -60

x1.2 = (-b ± √(b² - 4ac))/2a
x1.2 = (28 ± √1984)/10
x1.2 = (28 ± 8√31)/10

x1 = (14 + 4√31)/5
x2 = (14 - 4√31)/5