Question

Prove that √5+√7
irrational number.​

Answer 1

Step-by-step explanation:

let us assume root5 +root7 is ratinal number

root5+root7=a/b

a/b-root5 = root7 (sq on B.S)

a^/b^-7 = 5a/b×root5

:root 5 is tational number

this contradits root 5 is irrational ,so root5+root7 is irraionl number