Question

is (2+√5)(2+√5) rational or irrational? Explain

Answer 1

heyy !!!



solution:

(2+√5)(2+√5)=(2+√5)^2


now,



(2+√5)^2=4+5+4√5=>9+4√5

here ,√5 is irrational


hence ,(2+√5)(2+√5) ¡s irrational.


hope it helps✌

Answer 2

HY FRIEND.......


HERE IS YOUR ANSWER......^_^


(2+√5) (2+√5)

It is irrational number because difference of two irrationals need not be an irrational.


Yaa Difference of a rational and an irrational is irrational .