x²- 37x + 27 = 0
D = 1369 - 108 = 1261
x² - 210x = 0
x(x - 210) = 0
y(-y + 1) = 0
x² + 41x - 371
D = 1681 + 1484 = 3165
y² - 19 = 0
y² = 19
y = ±√19
3x² - 10 = 0
3x² = 10