Question

is the number =(5+√4)(5-√4)ratinal or irrational​

Answer 1

Answer:

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Answer 2

To prove it Rational or irrational

first simplify it

(5+√4) (5-√4)

Using identity

a² - b² = (a+b) (a-b)

(5)² - (√4)²

25 - 4

= 21

And we know 21 is. a rational number

Hence it is a Rational number

Regards

Akshat Rajput

◼ MATHS ARYABHATTA

◼ BRAINLY CHALLENGER

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