Question

find (5+√7) (2+ √5) is the answer rational?

Answer 1

Answer:

$(5 + \sqrt{7} )(2 + \sqrt{5} ) \\ \\ 10 + 5 \sqrt{5} + 2 \sqrt{7} + \sqrt{35}$

It is an irrational Number

Hope it helps to you !!

Answer 2

Answer:

it's a irrational number