Concept-wise Practice

surd square MCQ Questions for Class 10

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

Practice Questions

9 questions tagged with surd square.

Question 1/9 Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

यदि \(x=\sqrt{5}+\sqrt{2}\), तो (\(x^2-7\)2) का मान क्या है?

If \(x=\sqrt{5}+\sqrt{2}\), what is the value of (\(x^2-7\)2)?

Explanation opens after your attempt
Correct Answer

A. (40)

Step 1

Concept

\(x^2=5+2+2\sqrt{10}=7+2\sqrt{10}\).

Step 2

Why this answer is correct

Thus \(x^2-7=2\sqrt{10}\), and its square is (40).

Step 3

Exam Tip

First isolate the irrational part, then square it. चरण 1: \(x^2=5+2+2\sqrt{10}=7+2\sqrt{10}\)। चरण 2: इसलिए \(x^2-7=2\sqrt{10}\), और इसका वर्ग (40) है। चरण 3: पहले परिमेय भाग अलग करें, फिर वर्ग करें।

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Question 2/9 Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

यदि \(x=\sqrt{2}+\sqrt{5}\), तो (\(x-\sqrt{2}\)2) का मान क्या है?

If \(x=\sqrt{2}+\sqrt{5}\), what is the value of (\(x-\sqrt{2}\)2)?

Explanation opens after your attempt
Correct Answer

A. (5)

Step 1

Concept

\(x-\sqrt{2}=\sqrt{5}\).

Step 2

Why this answer is correct

Therefore (\(x-\sqrt{2}\)2=\(\sqrt{5}\)2=5).

Step 3

Exam Tip

Simplify inside the bracket before expanding the square. चरण 1: \(x-\sqrt{2}=\sqrt{5}\) है। चरण 2: इसलिए (\(x-\sqrt{2}\)2=\(\sqrt{5}\)2=5)। चरण 3: पूरे वर्ग को फैलाने से पहले कोष्ठक के अंदर सरल करें।

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Question 3/9 Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

यदि \(x=\sqrt{2}+\sqrt{3}\), तो \(x^2-2\sqrt{6}\) का मान क्या है?

If \(x=\sqrt{2}+\sqrt{3}\), what is the value of \(x^2-2\sqrt{6}\)?

Explanation opens after your attempt
Correct Answer

A. (5)

Step 1

Concept

(x-2=\(\sqrt{2}+\sqrt{3}\)2=5+2\sqrt{6}).

Step 2

Why this answer is correct

Subtracting \(2\sqrt{6}\) leaves (5).

Step 3

Exam Tip

After squaring, cancel like irrational terms. चरण 1: (x-2=\(\sqrt{2}+\sqrt{3}\)2=5+2\sqrt{6})। चरण 2: इसमें से \(2\sqrt{6}\) घटाने पर (5) बचता है। चरण 3: वर्ग करने के बाद समान अपरिमेय पदों को काटें।

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Question 4/9 Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

यदि \(x=\sqrt{11}+\sqrt{7}\), तो \(x^2-18\) का मान क्या है?

If \(x=\sqrt{11}+\sqrt{7}\), what is the value of \(x^2-18\)?

Explanation opens after your attempt
Correct Answer

A. \(2\sqrt{77}\)

Step 1

Concept

\(x^2=11+7+2\sqrt{77}=18+2\sqrt{77}\).

Step 2

Why this answer is correct

Therefore \(x^2-18=2\sqrt{77}\), which is irrational.

Step 3

Exam Tip

In the square of a sum of different surds, the middle term is the key. चरण 1: \(x^2=11+7+2\sqrt{77}=18+2\sqrt{77}\)। चरण 2: इसलिए \(x^2-18=2\sqrt{77}\), जो अपरिमेय है। चरण 3: दो अलग मूलों के योग का वर्ग करते समय बीच वाला पद मुख्य होता है।

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Question 5/9 Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 13

यदि \(x=\sqrt{2}+\sqrt{7}\), तो \(x^2-9\) का मान क्या है?

If \(x=\sqrt{2}+\sqrt{7}\), what is the value of \(x^2-9\)?

Explanation opens after your attempt
Correct Answer

A. \(2\sqrt{14}\)

Step 1

Concept

\(x^2=2+7+2\sqrt{14}=9+2\sqrt{14}\).

Step 2

Why this answer is correct

Therefore \(x^2-9=2\sqrt{14}\), which is irrational.

Step 3

Exam Tip

Square first, then subtract the rational part. चरण 1: \(x^2=2+7+2\sqrt{14}=9+2\sqrt{14}\)। चरण 2: इसलिए \(x^2-9=2\sqrt{14}\), जो अपरिमेय है। चरण 3: पहले वर्ग करें, फिर परिमेय भाग घटाएँ।

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Question 6/9 Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 13

कौन-सा विकल्प \(5+2\sqrt{6}\) के बराबर है?

Which option is equal to \(5+2\sqrt{6}\)?

Explanation opens after your attempt
Correct Answer

A. (\(\sqrt{3}+\sqrt{2}\)2)

Step 1

Concept

(\(\sqrt{3}+\sqrt{2}\)2=3+2+2\sqrt{6}).

Step 2

Why this answer is correct

This equals \(5+2\sqrt{6}\).

Step 3

Exam Tip

When squaring a sum of two surds, the middle term becomes \(2\sqrt{6}\). चरण 1: (\(\sqrt{3}+\sqrt{2}\)2=3+2+2\sqrt{6})। चरण 2: यह \(5+2\sqrt{6}\) के बराबर है। चरण 3: दो मूलों के योग का वर्ग करते समय बीच वाला पद \(2\sqrt{6}\) बनता है।

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Question 7/9 Expert Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 13

यदि \(x=\sqrt{7}+\sqrt{28}\), तो \(\frac{x^2}{7}\) का मान क्या है?

If \(x=\sqrt{7}+\sqrt{28}\), what is the value of \(\frac{x^2}{7}\)?

Explanation opens after your attempt
Correct Answer

A. (9)

Step 1

Concept

\(\sqrt{28}=2\sqrt{7}\), so \(x=3\sqrt{7}\).

Step 2

Why this answer is correct

(x-2=\(3\sqrt{7}\)2=63), hence \(\frac{x^2}{7}=9\).

Step 3

Exam Tip

Combine like surds before squaring. चरण 1: \(\sqrt{28}=2\sqrt{7}\), इसलिए \(x=3\sqrt{7}\)। चरण 2: (x-2=\(3\sqrt{7}\)2=63), अतः \(\frac{x^2}{7}=9\)। चरण 3: वर्ग करने से पहले समान मूल वाले पद जोड़ना सरल रहता है।

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Question 8/9 Hard Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

यदि \(x=\sqrt{5}+\sqrt{20}\), तो \(x^2\) का मान क्या है?

If \(x=\sqrt{5}+\sqrt{20}\), what is the value of \(x^2\)?

Explanation opens after your attempt
Correct Answer

B. (45)

Step 1

Concept

\(\sqrt{20}=2\sqrt{5}\), so \(x=3\sqrt{5}\).

Step 2

Why this answer is correct

(x-2=\(3\sqrt{5}\)2=9\times5=45).

Step 3

Exam Tip

Simplify surd terms before squaring. चरण 1: \(\sqrt{20}=2\sqrt{5}\), इसलिए \(x=3\sqrt{5}\)। चरण 2: (x-2=\(3\sqrt{5}\)2=9\times5=45)। चरण 3: वर्ग करने से पहले मूल वाले पदों को सरल करें।

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Question 9/9 Hard Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 14

यदि \(x=\sqrt{2}+\sqrt{3}\), तो \(x^2\) के बारे में सही कथन क्या है?

If \(x=\sqrt{2}+\sqrt{3}\), which statement about \(x^2\) is correct?

Explanation opens after your attempt
Correct Answer

A. \(x^2=5+2\sqrt{6}\), अपरिमेय\(x^2=5+2\sqrt{6}\), irrational

Step 1

Concept

Use ((a+b)2=a-2+2ab+b-2).

Step 2

Why this answer is correct

\(x^2=2+2\sqrt{6}+3=5+2\sqrt{6}\), which has an irrational part.

Step 3

Exam Tip

Do not forget the middle term when squaring a sum of surds. चरण 1: ((a+b)2=a-2+2ab+b-2) का प्रयोग करें। चरण 2: \(x^2=2+2\sqrt{6}+3=5+2\sqrt{6}\), जिसमें अपरिमेय भाग है। चरण 3: दो मूलों के योग का वर्ग करते समय बीच वाला पद न भूलें।

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