Q. 153.9( 7 Votes )

# Give an example of two irrationals whose product is rational.

Answer :

Let’s take (3 + ) and (3 ‒ ).

These are irrational numbers.

Their product = (3 + ) × (3 ‒ ) = 9 + 3√2 – 3√2 – (√2)^{2}

= 9 – 4 = 5 {which is rational}

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