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2ab MCQ Questions for Class 9

2ab se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

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2 questions tagged with 2ab.

Question 1/2 Hard Mathematics Exploring Algebraic Identities Algebraic identities Class 9 Level 63

( (a+b)2-\(a^2+b^2\) ) को सरल कीजिए।

Simplify ( (a+b)2-\(a^2+b^2\) ).

Explanation opens after your attempt
Correct Answer

B. (2ab)सही उत्तर

Step 1

Concept

( (a+b)2=a-2+2ab+b-2 ). Exam tip: after square terms cancel, (2ab) remains.

Step 2

Why this answer is correct

The correct answer is B. (2ab) / सही उत्तर. ( (a+b)2=a-2+2ab+b-2 ). Exam tip: after square terms cancel, (2ab) remains.

Step 3

Exam Tip

( (a+b)2=a-2+2ab+b-2 ) होता है। परीक्षा में वर्ग पद कटने के बाद (2ab) बचता है।

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Question 2/2 Medium Mathematics Exploring Algebraic Identities Algebraic identities Class 9 Level 63

( (a+b)2-\(a^2+b^2\) ) का मान क्या है?

What is the value of ( (a+b)2-\(a^2+b^2\) )?

Explanation opens after your attempt
Correct Answer

C. (2ab)

Step 1

Concept

( (a+b)2=a-2+2ab+b-2 ). Subtracting \(a^2+b^2\) leaves (2ab).

Step 2

Why this answer is correct

The correct answer is C. (2ab). ( (a+b)2=a-2+2ab+b-2 ). Subtracting \(a^2+b^2\) leaves (2ab).

Step 3

Exam Tip

( (a+b)2=a-2+2ab+b-2 ) है। \(a^2+b^2\) घटाने पर (2ab) बचता है।

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