Question

is (5+√7)(5-√7) rational or irrational number
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Answer 1

Rational number

hope it will help you

Answer 2

Answer:

This is a rational number.

Explanation:

x^2-y^2=(x+y)(x-y)

Here we have,

(5+√7) (5-√7)

So,

5^2-(√7)^2

so we get..

25-7

18

THANKU