Question

how can we show that given no. is rational or not rational

Answer 1

you need to distribute and you'll find that there will be a 2 terms involving radicals.

Answer 2

so its an irrational number...

Answer 3

can we solve them

Answer 4

like by solving , i got,
(6/root2)-(3root2)+17

Answer 5

that looks about right.... it can't be written as a fraction of 2 integers... a/b

so its irrational