( \(2+\sqrt{19}\)\(2-\sqrt{19}\) ) का मान क्या है?

What is the value of ( \(2+\sqrt{19}\)\(2-\sqrt{19}\) )?

Author: Muft Shiksha Editorial Team Published:
Explanation opens after your attempt
Correct Answer

B. ( -15 )

Step 1

Concept

Conjugate multiplication gives (22-\(\sqrt{19}\)2=4-19=-15). The middle terms cancel.

Step 2

Why this answer is correct

The correct answer is B. ( -15 ). Conjugate multiplication gives (22-\(\sqrt{19}\)2=4-19=-15). The middle terms cancel.

Step 3

Exam Tip

संयुग्मी गुणन से (22-\(\sqrt{19}\)2=4-19=-15) मिलता है। मध्य पद कट जाते हैं।

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( \(2+\sqrt{19}\)\(2-\sqrt{19}\) ) का मान क्या है? / What is the value of ( \(2+\sqrt{19}\)\(2-\sqrt{19}\) )?

Correct Answer: B. ( -15 ). Explanation: संयुग्मी गुणन से (22-\(\sqrt{19}\)2=4-19=-15) मिलता है। मध्य पद कट जाते हैं। / Conjugate multiplication gives (22-\(\sqrt{19}\)2=4-19=-15). The middle terms cancel.

Which concept should I revise for this Mathematics MCQ?

Conjugate multiplication gives (22-\(\sqrt{19}\)2=4-19=-15). The middle terms cancel.

What exam hint can help solve this Mathematics question?

संयुग्मी गुणन से (22-\(\sqrt{19}\)2=4-19=-15) मिलता है। मध्य पद कट जाते हैं।