Question

please answer me fast its urgent

Answer 1

hey there.
if you find any number within root ...u can mark it as irrational but keep in mind that no should not be perfect square....for eg √64...it is rational not irrational....because √64 is 8.
but if something like this...√54,√68....these are all irrational no.

so in ur above question all are irrational.

Answer 2

let 5+√2 is a rational number
5+√2=a/b. (where a and b are co prime and b non equal to 0
5=a/b-√2
5=a-√2b/b
5 is a rational number
a-√2b/b is also a rational number
but it is a contradiction
so, our assumption is wrong
5 is a rational number
5+√2 is an irrational number

hope it help

let 2/√2 is a rational number
2/√2=a/b ( where a and b are co prime and b not equal to zero )
2=a√2/b
2 is a rational number
a√2b is also be a rational number
but it is contradict
so,our assumption is wrong
2 is a rational number
2√2 is an irrational number