Question

$7 \sqrt{5}$
prove that it is irrational or not
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Answer 1

Answer:

it is irrational

Step-by-step explanation:

first assume it as rational

solve it in a/b

then conculde it is irrational

Answer 2

Answer:

To prove : 7√5 is irrational

let 7√5 be rational number

7√5 = a/b

√5 = a/7b

a/7b is rational

Hence √5 is rational but it contradicts the fact that √5 is irrational. This situation has arrised because our assumption is wrong .