=(7+ radical 7) +(7- radical 7)*(7+ radical 7) -(7- radical 7)
= 14*2 times the root number 7.
=28 times the root number 7
2.(3+2 times the root number 2). (3-2 times root number 2) 20 10 power+root number 8
The square of =3 -2 times the square of root number 2, and the power of 20 10+root number 8.
=(9-8) 20 10 power+root number 8
= 1+ root number 8
= 1+2 times the root number 2.