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Mathematics Algebraic Identities MCQ Questions for Class 9

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Algebraic Identities Practice Questions

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Question 1/4 Easy Mathematics MIX Algebraic Identities Class 9 Level 2

\(x^2+2x+1\) किस पहचान से जुड़ा है?

Which identity is related to \(x^2+2x+1\)?

Explanation opens after your attempt
Correct Answer

A. ((x+1)2)

Step 1

Concept

This is the form (a-2+2ab+b-2=(a+b)2). Check the sign of the middle term in identities.

Step 2

Why this answer is correct

The correct answer is A. ((x+1)2). This is the form (a-2+2ab+b-2=(a+b)2). Check the sign of the middle term in identities.

Step 3

Exam Tip

यह (a-2+2ab+b-2=(a+b)2) का रूप है। पहचान में मध्य पद के चिह्न को देखें।

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Question 2/4 Easy Mathematics MIX Algebraic Identities Class 9 Level 2

((a+b)2) का सूत्र क्या है?

What is the formula for ((a+b)2)?

Explanation opens after your attempt
Correct Answer

B. \(a^2+2ab+b^2\)

Step 1

Concept

In ((a+b)2), the middle term is (+2ab). Remember identities with signs.

Step 2

Why this answer is correct

The correct answer is B. \(a^2+2ab+b^2\). In ((a+b)2), the middle term is (+2ab). Remember identities with signs.

Step 3

Exam Tip

((a+b)2) में मध्य पद (+2ab) होता है। सूत्रों को चिह्न सहित याद करें।

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Question 3/4 Easy Mathematics MIX Algebraic Identities Class 9 Level 2

((a-b)2) का सही विस्तार कौन-सा है?

Which is the correct expansion of ((a-b)2)?

Explanation opens after your attempt
Correct Answer

B. \(a^2-2ab+b^2\)

Step 1

Concept

In ((a-b)2), the middle term is (-2ab). Never ignore the negative sign.

Step 2

Why this answer is correct

The correct answer is B. \(a^2-2ab+b^2\). In ((a-b)2), the middle term is (-2ab). Never ignore the negative sign.

Step 3

Exam Tip

((a-b)2) में मध्य पद (-2ab) होता है। ऋण चिह्न को कभी न छोड़ें।

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Question 4/4 Easy Mathematics MIX Algebraic Identities Class 9 Level 2

((a+b)(a-b)) किसके बराबर है?

((a+b)(a-b)) is equal to what?

Explanation opens after your attempt
Correct Answer

B. \(a^2-b^2\)

Step 1

Concept

This is the difference of squares identity. Remember ((a+b)(a-b)=a-2-b-2).

Step 2

Why this answer is correct

The correct answer is B. \(a^2-b^2\). This is the difference of squares identity. Remember ((a+b)(a-b)=a-2-b-2).

Step 3

Exam Tip

यह अंतर वर्ग पहचान है। याद रखें कि ((a+b)(a-b)=a-2-b-2)।

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