Question

From the given numbers which is an irrational number?
(3+√23),
2-√5,
√25,
(2√7)/(7√7)
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Answer 1

hope this helps u

(3+√23) is an irrational number

2-√5 is an irrational  number

√25 = √5*5= 5  it is an rational number

(2√7)/(7√7) by rationalization 2√7/7√7* 7√7/7√7= 2√7*7√7/ 7√7*7√7

                                                                                = 14 *7/49*7 = 98/343

⇒⇒(2√7)/(7√7) = 98/343 it is a rational number