Prove that 3+ root 5 is an irrational number

1.	Prove that 3+ root 5 is an irrational number
Answer» Let 3 + √ 5 = a, where a is a rational number= ✓5= a - 3 But √5 is an irrational no. So √5 = not a - 3So it is contradiction of our assumption So 3 + root 5 is an irrational number.

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