Concept-wise Practice

difference of squares MCQ Questions for Class 10

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

Practice Questions

4 questions tagged with difference of squares.

Question 1/4 Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

यदि \(x=\sqrt{13}+\sqrt{12}\), तो (x\cdot\(\sqrt{13}-\sqrt{12}\)) का मान क्या है?

If \(x=\sqrt{13}+\sqrt{12}\), what is the value of (x\cdot\(\sqrt{13}-\sqrt{12}\))?

Explanation opens after your attempt
Correct Answer

A. (1)

Step 1

Concept

This is a conjugate product.

Step 2

Why this answer is correct

(\(\sqrt{13}+\sqrt{12}\)\(\sqrt{13}-\sqrt{12}\)=13-12=1).

Step 3

Exam Tip

In such forms, identify the difference of squares before expanding. चरण 1: यह संयुग्मी गुणन है। चरण 2: (\(\sqrt{13}+\sqrt{12}\)\(\sqrt{13}-\sqrt{12}\)=13-12=1)। चरण 3: ऐसे रूपों में विस्तार करने से पहले अंतर के वर्ग को पहचानें।

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Question 2/4 Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 13

कौन-सा विकल्प (\(\sqrt{11}+\sqrt{3}\)\(\sqrt{11}-\sqrt{3}\)) की प्रकृति सही बताता है?

Which option correctly describes the nature of (\(\sqrt{11}+\sqrt{3}\)\(\sqrt{11}-\sqrt{3}\))?

Explanation opens after your attempt
Correct Answer

A. (8), परिमेय(8), rational

Step 1

Concept

This is of the form ((u+v)(u-v)).

Step 2

Why this answer is correct

The value is (11-3=8), which is rational.

Step 3

Exam Tip

Multiplying conjugate surds often removes the irrational part. चरण 1: यह ((u+v)(u-v)) के रूप में है। चरण 2: मान (11-3=8) आता है, जो परिमेय है। चरण 3: संयुग्मी पदों का गुणन अक्सर अपरिमेय भाग हटा देता है।

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Question 3/4 Hard Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

यदि \(a=\sqrt{2}+\sqrt{3}\) और \(b=\sqrt{3}-\sqrt{2}\), तो (ab) का मान क्या है?

If \(a=\sqrt{2}+\sqrt{3}\) and \(b=\sqrt{3}-\sqrt{2}\), what is the value of (ab)?

Explanation opens after your attempt
Correct Answer

A. (1)

Step 1

Concept

View (ab) as (\(\sqrt{3}+\sqrt{2}\)\(\sqrt{3}-\sqrt{2}\)).

Step 2

Why this answer is correct

This equals (\(\sqrt{3}\)2-\(\sqrt{2}\)2=3-2=1).

Step 3

Exam Tip

Since addition order does not change the sum, recognize the conjugate form. चरण 1: (ab=\(\sqrt{3}+\sqrt{2}\)\(\sqrt{3}-\sqrt{2}\)) के रूप में देखा जा सकता है। चरण 2: यह (\(\sqrt{3}\)2-\(\sqrt{2}\)2=3-2=1) है। चरण 3: क्रम बदलने से योग नहीं बदलता, इसलिए संयुग्मी रूप पहचानें।

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Question 4/4 Hard Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

निम्न में से कौन-सा मान \(1+\sqrt{2}\) और \(1-\sqrt{2}\) के गुणनफल के बराबर है?

Which value equals the product of \(1+\sqrt{2}\) and \(1-\sqrt{2}\)?

Explanation opens after your attempt
Correct Answer

C. (-1)

Step 1

Concept

This is a product of conjugates.

Step 2

Why this answer is correct

(\(1+\sqrt{2}\)\(1-\sqrt{2}\)=1-\(\sqrt{2}\)2=1-2=-1).

Step 3

Exam Tip

In conjugate multiplication, the middle irrational terms cancel. चरण 1: यह संयुग्मी संख्याओं का गुणन है। चरण 2: (\(1+\sqrt{2}\)\(1-\sqrt{2}\)=1-\(\sqrt{2}\)2=1-2=-1)। चरण 3: संयुग्मी गुणन में बीच के अपरिमेय पद कट जाते हैं।

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