Which of the following is an example of why irrational numbers are 'not' closed under addition?


√4 + √4 = 2 + 2 = 4, and 4 is not irrantonal

1/2 + 1/2 = 1, and 1 is not irrational

√10 + (-√10) = 0, and 0 is not irrational

-3 + 3 = 0, and 0 is not irrational

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