Question

prove 2√5-7 is irrational
plz ​

Answer 1

Step-by-step explanation:

Let, 5+2√7 be rational. Therefore, 5+2√7 =a/b where a and b are integers having no common factors other than 1. Since, a and b are integers, therefore, √7 is rational. ... Hence, 5+2√7 is irrational.