In solving a quadratic equation, one of the values of the variables x is 233.356. The solution rounded to two significant figures is :

1. 233.36

2. 233.35

3. 233.3

4. 230

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