Question

prove that √21 isirrational no​

Answer 1

Answer:

1) √21 is irrational. Let's assume that √21 is rational. So √21 can be expressed in the form p/q form. p/q is the reduced form of rational number so p and q have no common factors other than 1, i.e. they are co-prime numbers.

2) A number is said to be irrational if it cannot be expressed in the form of a ratio p/q, where q not equal to 0. √21 = 4.58257569495584 which is a non terminating decimal. Thus √21 is irrational.

Step-by-step explanation:

Hope it will help you.

Answer 2

Answer:

it's irrational coz it's not having s proper Square, and it cannot be written in a p/q form