In an exam, which precaution is most important while writing the irrationality proof of (\sqrt{2}), (\sqrt{3}), or (\sqrt{5})?

Correct answer: Clearly write the common factor and coprime contradiction at each final stage

Step 1: Such proofs begin with the rational assumption. Step 2: At the end, a common factor is found in numerator and denominator. Step 3: In exams, clearly writing the coprime contradiction is most important.