√(3/7) and 8/(5+√(2))

√(3/7) Not so difficult

The Sq Root of 3 divided by the Sq root of 7 one must approximate Sq Roots!

1.73/2.64

= 0.6546536707

8 divided by 5 plus square root of 2

multiply by the conjugate of the denominator to top and bottom

= 3.01421356237