If the roots of the quadratic equation, px(x - 2) + 6 = 0 are equal, then the value of p is:

1. 0

2. 4

3. 6

4. none of these

The roots of the quadratic equation 3x² = 6x is:

1. 0

2. 2

3. 0 and 2

4. 0 and 6