please help me with the following problems:

1.For x2- 25 = 0, x=

2.Add and simplify: 5/6+1/4

3.Simplify the square root of 27 + the square root of 75.

4.solve:3xsquared-2x-2=0

5.Find N for log2N=3

6.Find N for logb32=5

thanks so much for your help!!!