SOLUTION: Are positive irrational numbers closed under addition and multiplication?

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Question 895048: Are positive irrational numbers closed under addition and multiplication?
Answer by reviewermath(1029) About Me  (Show Source):
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Q:
Are positive irrational numbers closed under addition and multiplication?
A:
Irrational numbers are NOT closed under addition and multiplication.
sqrt%282%29 and -sqrt%282%29 are both irrational numbers but their sum is zero which is a rational number. Their product is -2 which is also a rational number.