Question

Show that 7_5 root is irrational, give that 5 root is irrational.

Answer 1

Answer:

Step-by-step explanation:

https://www.teachoo.com/8976/2862/Question-7-(Or-2nd)/category/CBSE-Class-10-Sample-Paper-for-2019-Boards/

Answer 2

assume 7-√5 is ration the

there fore

7-√5 =p/q

√5=7-p/q

√5=7q-p/q

rhs is a rational

there fore √5 is also rational it controducts the truth

our assumption is wrong

there for it is proved irration