Expert Mathematics Quadratic Equations Class 10 Level 38

समीकरण \(7x^2-2\sqrt{21}x+3=0\) में मूलों की प्रकृति क्या है?

What is the nature of roots in \(7x^2-2\sqrt{21}x+3=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=\(-2\sqrt{21}\)2-4(7)(3)=84-84=0). (D=0) gives equal roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=\(-2\sqrt{21}\)2-4(7)(3)=84-84=0). (D=0) gives equal roots.

Step 3

Exam Tip

यहाँ (D=\(-2\sqrt{21}\)2-4(7)(3)=84-84=0) है। (D=0) से समान मूल मिलते हैं।

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Mathematics Answer, Explanation and Revision Hints

समीकरण \(7x^2-2\sqrt{21}x+3=0\) में मूलों की प्रकृति क्या है? / What is the nature of roots in \(7x^2-2\sqrt{21}x+3=0\)?

Correct Answer: A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Explanation: यहाँ (D=\(-2\sqrt{21}\)2-4(7)(3)=84-84=0) है। (D=0) से समान मूल मिलते हैं। / Here (D=\(-2\sqrt{21}\)2-4(7)(3)=84-84=0). (D=0) gives equal roots.

Which concept should I revise for this Mathematics MCQ?

Here (D=\(-2\sqrt{21}\)2-4(7)(3)=84-84=0). (D=0) gives equal roots.

What exam hint can help solve this Mathematics question?

यहाँ (D=\(-2\sqrt{21}\)2-4(7)(3)=84-84=0) है। (D=0) से समान मूल मिलते हैं।

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