Question

prove that 7-√5 is an irrational number.​

Answer 1

Step-by-step explanation:

please mark as braunliest.....

Let 7-√5 is an irrational no,

we take a and b as co-prime no whose factor is only 1,

a/b=7-√5

√5=-a/b-7

here √5 is irrational and -a/b-7 is rational

so , 7-√5 is irrational

hence,proves