The roots of the equation x² - 3x - 10 = 0 are

1. 2, -5
2. -2, 5
3. 2, 5
4. -2, -5

The value(s) of k for which the quadratic equation 2x² - kx + k = 0 has equal roots is (are)

1. 0 only
2. 4
3. 8 only
4. 0, 8

If the equation 3x² - kx + 2k = 0 has equal roots, then the value(s) of k is (are)

1. 6
2. 0 only
3. 24 only
4. 0 or 24