Concept-wise Practice

algebraic-expression MCQ Questions for Class 10

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

Practice Questions

5 questions tagged with algebraic-expression.

Question 1/5 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 2/5 Hard Mathematics Chapter 1: Real Numbers 5: Irrational numbers Class 10 Level 15

यदि \(x=1+\sqrt{2}\), तो \(x^2-2x\) का मान क्या है?

If \(x=1+\sqrt{2}\), what is the value of \(x^2-2x\)?

Explanation opens after your attempt
Correct Answer

A. (1)

Step 1

Concept

(x-2-2x=x(x-2)).

Step 2

Why this answer is correct

With \(x=1+\sqrt{2}\), \(x-2=\sqrt{2}-1\), so the product (\(1+\sqrt{2}\)\(\sqrt{2}-1\)=1).

Step 3

Exam Tip

Recognizing conjugate-like forms makes calculation shorter. चरण 1: (x-2-2x=x(x-2)) है। चरण 2: \(x=1+\sqrt{2}\) रखने पर \(x-2=\sqrt{2}-1\), इसलिए गुणन (\(1+\sqrt{2}\)\(\sqrt{2}-1\)=1) मिलता है। चरण 3: संयुग्मी जैसे रूपों को पहचानने से गणना छोटी होती है।

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

यदि \(x=\sqrt{7}\), तो \(x^2+4x\) किसके बराबर है?

If \(x=\sqrt{7}\), what is \(x^2+4x\) equal to?

Explanation opens after your attempt
Correct Answer

A. \(7+4\sqrt{7}\)

Step 1

Concept

(x-2=\(\sqrt{7}\)2=7).

Step 2

Why this answer is correct

\(4x=4\sqrt{7}\), so \(x^2+4x=7+4\sqrt{7}\).

Step 3

Exam Tip

Simplify the square and the multiplication separately. चरण 1: (x-2=\(\sqrt{7}\)2=7)। चरण 2: \(4x=4\sqrt{7}\), इसलिए \(x^2+4x=7+4\sqrt{7}\)। चरण 3: वर्ग और गुणा को अलग-अलग सरल करें।

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

यदि \(x=\sqrt{5}\), तो \(x^2+3x\) किसके बराबर है?

If \(x=\sqrt{5}\), what is \(x^2+3x\) equal to?

Explanation opens after your attempt
Correct Answer

A. \(5+3\sqrt{5}\)

Step 1

Concept

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

Step 2

Why this answer is correct

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

Step 3

Exam Tip

Simplify the square and the multiplication separately. चरण 1: (x-2=\(\sqrt{5}\)2=5)। चरण 2: \(3x=3\sqrt{5}\), इसलिए \(x^2+3x=5+3\sqrt{5}\)। चरण 3: वर्ग और गुणा को अलग-अलग सरल करें।

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

यदि \(x=\sqrt{3}\), तो \(x^2+2x\) किसके बराबर है?

If \(x=\sqrt{3}\), what is \(x^2+2x\) equal to?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

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

Step 2

Why this answer is correct

\(2x=2\sqrt{3}\), so \(x^2+2x=3+2\sqrt{3}\).

Step 3

Exam Tip

Simplify the square and the product separately. चरण 1: (x-2=\(\sqrt{3}\)2=3)। चरण 2: \(2x=2\sqrt{3}\), इसलिए \(x^2+2x=3+2\sqrt{3}\)। चरण 3: वर्ग और गुणा को अलग-अलग सरल करें।

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