Question

2. Prove that 3 + 2/5 is irrational.
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Answer 1

Answer:

first please specify that is it √5 or /5

Answer 2

Answer:

3+2√5=a/b

2√5=a/b - 3

taking LCM on the right side,

2√5= a-3b /b

now, √5 = 1/2 X a-3b /b

→ √5= a-3b/2b

left hand side we have an irrational number and right side we have rational number .Since, irrational number cant be equal to a rational number so it is a contradiction, our supposition is wrong and hence, 3+ 2√5 is an irrational number.

Step-by-step explanation:

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