Search Class 10 Questions

15 results found for "difference of squares" in Class 10.

Question Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

कौन सा विकल्प (\(\sqrt{3}+1\)\(\sqrt{3}-1\)) का सही मान और प्रकार देता है?

Which option gives the correct value and type of (\(\sqrt{3}+1\)\(\sqrt{3}-1\))?

Explanation opens after your attempt
Correct Answer

A. (2) और परिमेय(2) and rational

Step 1

Concept

This is a difference of squares form.

Step 2

Why this answer is correct

(\(\sqrt{3}+1\)\(\sqrt{3}-1\)=3-1=2) which is rational.

Step 3

Exam Tip

Product of conjugates often removes the radical. चरण 1: यह अंतर के वर्ग का रूप है। चरण 2: (\(\sqrt{3}+1\)\(\sqrt{3}-1\)=3-1=2) जो परिमेय है। चरण 3: संयुग्मी पदों का गुणनफल अक्सर वर्गमूल हटा देता है।

Open Question Page
Ask Friends
Question 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।

Open Question Page
Ask Friends
Question 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।

Open Question Page
Ask Friends
Question 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।

Open Question Page
Ask Friends
Question Hard Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

कौन-सा विकल्प \(\frac{3}{2+\sqrt{5}}\) का परिमेय हर वाला रूप है?

Which option is the rationalized form of \(\frac{3}{2+\sqrt{5}}\)?

Explanation opens after your attempt
Correct Answer

B. (3\(\sqrt{5}-2\))

Step 1

Concept

The conjugate of the denominator is \(2-\sqrt{5}\).

Step 2

Why this answer is correct

(\frac{3}{2+\sqrt{5}}\times\frac{2-\sqrt{5}}{2-\sqrt{5}}=\frac{3\(2-\sqrt{5}\)}{4-5}=3\(\sqrt{5}-2\)).

Step 3

Exam Tip

Use the difference of squares in the denominator when multiplying by a conjugate. चरण 1: हर का संयुग्मी \(2-\sqrt{5}\) है। चरण 2: (\frac{3}{2+\sqrt{5}}\times\frac{2-\sqrt{5}}{2-\sqrt{5}}=\frac{3\(2-\sqrt{5}\)}{4-5}=3\(\sqrt{5}-2\))। चरण 3: संयुग्मी से गुणा करते समय हर में अंतर के वर्ग का प्रयोग करें।

Open Question Page
Ask Friends
Question 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।

Open Question Page
Ask Friends
Question Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

(\left\(\sqrt{13}-\sqrt{5}\right\)\left\(\sqrt{13}+\sqrt{5}\right\)) का मान क्या है?

What is the value of (\left\(\sqrt{13}-\sqrt{5}\right\)\left\(\sqrt{13}+\sqrt{5}\right\))?

Explanation opens after your attempt
Correct Answer

A. (8)

Step 1

Concept

This is of the form ((a-b)(a+b)=a-2-b-2).

Step 2

Why this answer is correct

(\(\sqrt{13}\)2-\(\sqrt{5}\)2=13-5=8).

Step 3

Exam Tip

In conjugate multiplication, directly use the difference of squares. चरण 1: यह ((a-b)(a+b)=a-2-b-2) का रूप है। चरण 2: (\(\sqrt{13}\)2-\(\sqrt{5}\)2=13-5=8)। चरण 3: संयुग्म गुणन में वर्गों का अंतर सीधे लगाएं।

Open Question Page
Ask Friends
Question Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

यदि \(a=\sqrt{5}+3\) और \(b=\sqrt{5}-3\), तो (ab) का मान क्या है?

If \(a=\sqrt{5}+3\) and \(b=\sqrt{5}-3\), what is the value of (ab)?

Explanation opens after your attempt
Correct Answer

A. (-4)

Step 1

Concept

(ab=\(\sqrt{5}+3\)\(\sqrt{5}-3\)).

Step 2

Why this answer is correct

Using difference of squares, (\(\sqrt{5}\)2-32=5-9=-4).

Step 3

Exam Tip

Recognising conjugate form makes the calculation shorter. चरण 1: (ab=\(\sqrt{5}+3\)\(\sqrt{5}-3\)) है। चरण 2: वर्गों के अंतर से (\(\sqrt{5}\)2-32=5-9=-4)। चरण 3: संयुग्म रूप पहचानकर गणना छोटी हो जाती है।

Open Question Page
Ask Friends
Question Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

(\left\(4+\sqrt{7}\right\)\left\(4-\sqrt{7}\right\)) का मान क्या है?

What is the value of (\left\(4+\sqrt{7}\right\)\left\(4-\sqrt{7}\right\))?

Explanation opens after your attempt
Correct Answer

A. (9)

Step 1

Concept

This is of the form ((a+b)(a-b)=a-2-b-2).

Step 2

Why this answer is correct

(42-\(\sqrt{7}\)2=16-7=9).

Step 3

Exam Tip

In conjugate multiplication, directly use the difference of squares. चरण 1: यह ((a+b)(a-b)=a-2-b-2) का रूप है। चरण 2: (42-\(\sqrt{7}\)2=16-7=9)। चरण 3: संयुग्म गुणन में वर्गों का अंतर सीधे लगाएं।

Open Question Page
Ask Friends
Question Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

(\left\(\sqrt{11}-\sqrt{2}\right\)\left\(\sqrt{11}+\sqrt{2}\right\)) का मान क्या है?

What is the value of (\left\(\sqrt{11}-\sqrt{2}\right\)\left\(\sqrt{11}+\sqrt{2}\right\))?

Explanation opens after your attempt
Correct Answer

A. (9)

Step 1

Concept

This is of the form ((a-b)(a+b)=a-2-b-2).

Step 2

Why this answer is correct

(\(\sqrt{11}\)2-\(\sqrt{2}\)2=11-2=9).

Step 3

Exam Tip

In conjugate multiplication, directly use the difference of squares. चरण 1: यह ((a-b)(a+b)=a-2-b-2) का रूप है। चरण 2: (\(\sqrt{11}\)2-\(\sqrt{2}\)2=11-2=9)। चरण 3: संयुग्म गुणन में वर्गों का अंतर सीधे लगाएं।

Open Question Page
Ask Friends
Question Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

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

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

Explanation opens after your attempt
Correct Answer

B. (-1)

Step 1

Concept

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

Step 2

Why this answer is correct

Using difference of squares, (\(\sqrt{3}\)2-22=3-4=-1).

Step 3

Exam Tip

Recognising conjugate form makes the calculation shorter. चरण 1: (ab=\(\sqrt{3}+2\)\(\sqrt{3}-2\)) है। चरण 2: वर्गों के अंतर से (\(\sqrt{3}\)2-22=3-4=-1)। चरण 3: संयुग्म रूप पहचानकर गणना छोटी हो जाती है।

Open Question Page
Ask Friends
Question Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

(\left\(3+\sqrt{5}\right\)\left\(3-\sqrt{5}\right\)) का मान क्या है?

What is the value of (\left\(3+\sqrt{5}\right\)\left\(3-\sqrt{5}\right\))?

Explanation opens after your attempt
Correct Answer

A. (4)

Step 1

Concept

This is of the form ((a+b)(a-b)=a-2-b-2).

Step 2

Why this answer is correct

(32-\(\sqrt{5}\)2=9-5=4).

Step 3

Exam Tip

In conjugate multiplication, directly use difference of squares. चरण 1: यह ((a+b)(a-b)=a-2-b-2) का रूप है। चरण 2: (32-\(\sqrt{5}\)2=9-5=4)। चरण 3: संयुग्म गुणन में वर्गों का अंतर सीधे लगाएं।

Open Question Page
Ask Friends
Question Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 13

(\left\(\sqrt{7}-\sqrt{3}\right\)\left\(\sqrt{7}+\sqrt{3}\right\)) का मान क्या है?

What is the value of (\left\(\sqrt{7}-\sqrt{3}\right\)\left\(\sqrt{7}+\sqrt{3}\right\))?

Explanation opens after your attempt
Correct Answer

A. (4)

Step 1

Concept

This is of the form ((a-b)(a+b)=a-2-b-2).

Step 2

Why this answer is correct

(\(\sqrt{7}\)2-\(\sqrt{3}\)2=7-3=4).

Step 3

Exam Tip

In conjugate multiplication, directly use the difference of squares. चरण 1: यह ((a-b)(a+b)=a-2-b-2) का रूप है। चरण 2: (\(\sqrt{7}\)2-\(\sqrt{3}\)2=7-3=4)। चरण 3: संयुग्म गुणन में सीधे वर्गों का अंतर लगाएं।

Open Question Page
Ask Friends
Question Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 13

यदि \(a=\sqrt{2}+1\) और \(b=\sqrt{2}-1\), तो (ab) का मान क्या है?

If \(a=\sqrt{2}+1\) and \(b=\sqrt{2}-1\), what is the value of (ab)?

Explanation opens after your attempt
Correct Answer

A. (1)

Step 1

Concept

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

Step 2

Why this answer is correct

Using difference of squares, (\(\sqrt{2}\)2-12=2-1=1).

Step 3

Exam Tip

Learn to recognise conjugate forms like (a+b) and (a-b). चरण 1: (ab=\(\sqrt{2}+1\)\(\sqrt{2}-1\)) है। चरण 2: वर्गों के अंतर से (\(\sqrt{2}\)2-12=2-1=1)। चरण 3: (a+b) और (a-b) जैसे संयुग्म रूप पहचानना सीखें।

Open Question Page
Ask Friends
Question Medium Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 13

(\left\(2+\sqrt{3}\right\)\left\(2-\sqrt{3}\right\)) का मान क्या है?

What is the value of (\left\(2+\sqrt{3}\right\)\left\(2-\sqrt{3}\right\))?

Explanation opens after your attempt
Correct Answer

A. (1)

Step 1

Concept

This is of the form ((a+b)(a-b)=a-2-b-2).

Step 2

Why this answer is correct

(22-\(\sqrt{3}\)2=4-3=1).

Step 3

Exam Tip

For conjugate products, difference of squares gives the answer quickly. चरण 1: यह ((a+b)(a-b)=a-2-b-2) का रूप है। चरण 2: (22-\(\sqrt{3}\)2=4-3=1)। चरण 3: संयुग्म रूप वाले गुणन में वर्गों का अंतर जल्दी उत्तर देता है।

Open Question Page
Ask Friends
Student Class Required

Select your class first

Quiz questions, daily challenge and practice pages will open according to your selected class. Class 11/12 ke liye stream bhi select karein.