Question

3 +2 root5 is rational number
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Answer 1

Step-by-step explanation:

Proof: Let us assume that 3 + 2√5 is a rational number. This shows (a-3b)/2b is a rational number. But we know that But √5 is an irrational number.

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Answer 2

Answer:

Step-by-step explanation:

5 is irrational. To prove: 3 + 2√5 is an irrational number.

Proof: Let us assume that 3 + 2√5 is a rational number. This shows (a-3b)/2b is a rational number. But we know that But √5 is an irrational number.