Concept-wise Practice

equal-zeroes MCQ Questions for Class 10

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Practice Questions

5 questions tagged with equal-zeroes.

Question 1/5 Expert Mathematics Chapter 2: Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि (p(x)=x-2-2x+n) के शून्यक समान और अपरिमेय हैं, तो (n) के बारे में कौन सा कथन सही है?

If (p(x)=x-2-2x+n) has equal and irrational zeroes, which statement about (n) is correct?

Explanation opens after your attempt
Correct Answer

A. ऐसा कोई वास्तविक (n) नहीं हैNo such real (n) exists

Step 1

Concept

For equal zeroes, (D=0), so (4-4n=0) and (n=1). Then the zero is (1), which is not irrational.

Step 2

Why this answer is correct

The correct answer is A. ऐसा कोई वास्तविक (n) नहीं है / No such real (n) exists. For equal zeroes, (D=0), so (4-4n=0) and (n=1). Then the zero is (1), which is not irrational.

Step 3

Exam Tip

समान शून्यकों के लिए (D=0), यानी (4-4n=0), इसलिए (n=1)। तब शून्यक (1) है, जो अपरिमेय नहीं है।

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Question 2/5 Expert Mathematics Chapter 2: Polynomials Irrational numbers and real numbers Class 10 Level 25

यदि (p(x)=x-2-2\sqrt{10}x+10) है, तो इसके शून्यकों के बारे में सही कथन क्या है?

If (p(x)=x-2-2\sqrt{10}x+10), which statement about its zeroes is correct?

Explanation opens after your attempt
Correct Answer

A. दोनों शून्यक \(\sqrt{10}\) हैंBoth zeroes are \(\sqrt{10}\)

Step 1

Concept

(p(x)=\(x-\sqrt{10}\)2), so the zero \(\sqrt{10}\) occurs twice. A perfect-square form quickly gives equal zeroes.

Step 2

Why this answer is correct

The correct answer is A. दोनों शून्यक \(\sqrt{10}\) हैं / Both zeroes are \(\sqrt{10}\). (p(x)=\(x-\sqrt{10}\)2), so the zero \(\sqrt{10}\) occurs twice. A perfect-square form quickly gives equal zeroes.

Step 3

Exam Tip

(p(x)=\(x-\sqrt{10}\)2), इसलिए शून्यक दो बार \(\sqrt{10}\) है। पूर्ण वर्ग रूप से समान शून्यक तुरंत मिलते हैं।

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Question 3/5 Hard Mathematics Chapter 2: Polynomials Irrational numbers and real numbers Class 10 Level 27

यदि (p(x)=x-2-2\sqrt{3}x+3) है, तो इसके शून्यकों के बारे में सही कथन कौन सा है?

If (p(x)=x-2-2\sqrt{3}x+3), which statement about its zeroes is correct?

Explanation opens after your attempt
Correct Answer

B. दो समान अपरिमेय शून्यक हैंIt has two equal irrational zeroes

Step 1

Concept

Since (p(x)=\(x-\sqrt{3}\)2), both zeroes are \(\sqrt{3}\). Recognize perfect-square form for equal zeroes.

Step 2

Why this answer is correct

The correct answer is B. दो समान अपरिमेय शून्यक हैं / It has two equal irrational zeroes. Since (p(x)=\(x-\sqrt{3}\)2), both zeroes are \(\sqrt{3}\). Recognize perfect-square form for equal zeroes.

Step 3

Exam Tip

(p(x)=\(x-\sqrt{3}\)2), इसलिए दोनों शून्यक \(\sqrt{3}\) हैं। समान शून्यक के लिए पूर्ण वर्ग रूप पहचानें।

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Question 4/5 Expert Mathematics Chapter 2: Polynomials Geometrical meaning of the zeroes of a polynomial. Class 10 Level 24

यदि किसी द्विघात बहुपद के ग्राफ का शीर्ष (x)-अक्ष पर है तो वास्तविक शून्यकों के बारे में क्या सही है?

If the vertex of a quadratic polynomial graph lies on the (x)-axis, what is correct about its real zeroes?

Explanation opens after your attempt
Correct Answer

A. दोनों वास्तविक शून्यक समान हैंBoth real zeroes are equal

Step 1

Concept

When the vertex lies on the (x)-axis, the parabola touches the axis at one point. Hence the zeroes are equal.

Step 2

Why this answer is correct

The correct answer is A. दोनों वास्तविक शून्यक समान हैं / Both real zeroes are equal. When the vertex lies on the (x)-axis, the parabola touches the axis at one point. Hence the zeroes are equal.

Step 3

Exam Tip

शीर्ष (x)-अक्ष पर होने पर परवलय अक्ष को एक ही बिंदु पर छूता है। इसलिए शून्यक समान होते हैं।

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Question 5/5 Expert Mathematics Chapter 2: Polynomials Geometrical meaning of the zeroes of a polynomial. Class 10 Level 24

एक द्विघात बहुपद का ग्राफ (x)-अक्ष को एक ही बिंदु ((4,0)) पर छूता है। उसके शून्यक कैसे होंगे?

The graph of a quadratic polynomial touches the (x)-axis at only one point ((4,0)). What type of zeroes does it have?

Explanation opens after your attempt
Correct Answer

A. बराबर शून्यक (4) और (4)Equal zeroes (4) and (4)

Step 1

Concept

When a quadratic graph touches at one point its two zeroes are equal. Treat it as a repeated zero in exams.

Step 2

Why this answer is correct

The correct answer is A. बराबर शून्यक (4) और (4) / Equal zeroes (4) and (4). When a quadratic graph touches at one point its two zeroes are equal. Treat it as a repeated zero in exams.

Step 3

Exam Tip

द्विघात ग्राफ एक बिंदु पर छूता है तो दोनों शून्यक समान होते हैं। परीक्षा में इसे दोहराया शून्यक मानें।

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