Prove that √5-3√2 is an irrational number
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In √5−3√2,
the number √2 is an irrational number.
Also, 5 is a rational number.
We know, the difference of a rational number and an irrational number is always an irrational number.
Therefore, since √2 is an irrational number, √5−3√2 is also an irrational number.
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