Sum
Classify the following numbers as rational or irrational :-
` 2-sqrt5`
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Solution
`2-sqrt5`
2 is a rational number and sqrt5 is an irrational number.
`therefore 2-sqrt5 " is an irrational number."`
∴ The difference of a rational number and an irrational number is irrational.
Concept: Operations on Real Numbers
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