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Class 9 Mathematics Number Systems Irrational numbersEasyLevel 18

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What is the value of ((\sqrt{6}+2)(\sqrt{6}-2))?

Answer and explanation

Correct answer: (2)

This is ((a+b)(a-b)=a^2-b^2), so the value is (6-4=2). Conjugates can make the result rational.

Related tags

Number-Systems Irrational-Numbers Easy

Frequently asked questions

What is the correct answer to this question?

(2)

Why is this the correct answer?

This is ((a+b)(a-b)=a^2-b^2), so the value is (6-4=2). Conjugates can make the result rational.

Which subject and chapter does this question cover?

This is a Class 9 Mathematics question. Chapter: Number Systems. Topic: Irrational numbers.

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