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Which of the following numbers is definitely rational?
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Answer and explanation
Correct answer: (\sqrt{50}-\sqrt{8})
Here (\sqrt{50}=5\sqrt{2}) and (\sqrt{8}=2\sqrt{2}), so the difference is (3\sqrt{2}), irrational; no listed expression is rational, so this item must be checked carefully.
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What is the correct answer to this question?
(\sqrt{50}-\sqrt{8})
Why is this the correct answer?
Here (\sqrt{50}=5\sqrt{2}) and (\sqrt{8}=2\sqrt{2}), so the difference is (3\sqrt{2}), irrational; no listed expression is rational, so this item must be checked carefully.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Polynomials. Topic: Irrational numbers and real numbers.
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