3х² + 8х - 3 = 0
D = 8² - 4 * 3 * (-3) = 64 + 28 = 100
D > 0 будет два корня
- 8 - √100 - 8 - 10 -18
Х1 =----------------------- = ------------------ = ------------------- = - 3
2 * 3 6 6
- 8 + √100 - 8 + 10 2
Х2 = --------------------- = ----------------------- = ------------ = 1/3
2 * 3 6 6