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Class 10 Mathematics Hard Quiz

Level 27 • 50/50 questions • 30 seconds per question.

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Question 1 / 50 0 score
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यदि (p(x)=x-2-2) है, तो (p(x)) के शून्यकों के बारे में सही कथन कौन सा है?

If (p(x)=x-2-2), which statement about the zeroes of (p(x)) is correct?

Explanation opens after your attempt
Correct Answer

B. दोनों अपरिमेय वास्तविक हैंBoth are irrational real

Step 1

Concept

From \(x^2-2=0\), \(x=\pm\sqrt{2}\), which are irrational real numbers. In exams, check both real nature and rationality of roots.

Step 2

Why this answer is correct

The correct answer is B. दोनों अपरिमेय वास्तविक हैं / Both are irrational real. From \(x^2-2=0\), \(x=\pm\sqrt{2}\), which are irrational real numbers. In exams, check both real nature and rationality of roots.

Step 3

Exam Tip

\(x^2-2=0\) से \(x=\pm\sqrt{2}\), जो अपरिमेय वास्तविक संख्याएँ हैं। परीक्षा में मूल निकालते समय वास्तविकता और परिमेयता दोनों जाँचें।

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यदि किसी द्विघात बहुपद के शून्यक \(3+\sqrt{5}\) और \(3-\sqrt{5}\) हैं, तो उनके योग का प्रकार क्या है?

If the zeroes of a quadratic polynomial are \(3+\sqrt{5}\) and \(3-\sqrt{5}\), what is the type of their sum?

Explanation opens after your attempt
Correct Answer

B. परिमेय संख्याRational number

Step 1

Concept

The sum is \(3+\sqrt{5}+3-\sqrt{5}=6\), which is rational. Conjugate irrational numbers often have a rational sum.

Step 2

Why this answer is correct

The correct answer is B. परिमेय संख्या / Rational number. The sum is \(3+\sqrt{5}+3-\sqrt{5}=6\), which is rational. Conjugate irrational numbers often have a rational sum.

Step 3

Exam Tip

योग \(3+\sqrt{5}+3-\sqrt{5}=6\) है, जो परिमेय है। संयुग्मी अपरिमेय संख्याओं का योग अक्सर परिमेय होता है।

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यदि (p(x)=x-2-6x+4) है, तो इसके शून्यक किस प्रकार के हैं?

If (p(x)=x-2-6x+4), what type of zeroes does it have?

Explanation opens after your attempt
Correct Answer

A. दो भिन्न अपरिमेय वास्तविक शून्यकTwo distinct irrational real zeroes

Step 1

Concept

The discriminant is (D=36-16=20), so the zeroes are \(3\pm\sqrt{5}\). If (D) is not a perfect square, real zeroes can be irrational.

Step 2

Why this answer is correct

The correct answer is A. दो भिन्न अपरिमेय वास्तविक शून्यक / Two distinct irrational real zeroes. The discriminant is (D=36-16=20), so the zeroes are \(3\pm\sqrt{5}\). If (D) is not a perfect square, real zeroes can be irrational.

Step 3

Exam Tip

विविक्तकर (D=36-16=20) है, इसलिए शून्यक \(3\pm\sqrt{5}\) हैं। (D) पूर्ण वर्ग न हो तो वास्तविक शून्यक अपरिमेय हो सकते हैं।

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यदि \(2+\sqrt{3}\) किसी परिमेय गुणांकों वाले द्विघात बहुपद का शून्यक है, तो दूसरा शून्यक क्या होगा?

If \(2+\sqrt{3}\) is a zero of a quadratic polynomial with rational coefficients, what will the other zero be?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

With rational coefficients, the conjugate of an irrational zero is also a zero. So \(2-\sqrt{3}\) will be the other zero.

Step 2

Why this answer is correct

The correct answer is A. \(2-\sqrt{3}\). With rational coefficients, the conjugate of an irrational zero is also a zero. So \(2-\sqrt{3}\) will be the other zero.

Step 3

Exam Tip

परिमेय गुणांकों में अपरिमेय शून्यक का संयुग्मी भी शून्यक होता है। इसलिए \(2-\sqrt{3}\) दूसरा शून्यक होगा।

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किस द्विघात बहुपद के शून्यक \(\sqrt{7}\) और \(-\sqrt{7}\) हैं?

Which quadratic polynomial has zeroes \(\sqrt{7}\) and \(-\sqrt{7}\)?

Explanation opens after your attempt
Correct Answer

B. \(x^2-7\)

Step 1

Concept

\(The sum of zeroes is (0) and product is (-7), so the polynomial is (x^2-7). Use (x^2-\)sumx+product) to form a polynomial from zeroes.

Step 2

Why this answer is correct

\(The correct answer is B. (x^2-7). The sum of zeroes is (0) and product is (-7), so the polynomial is (x^2-7). Use (x^2-\)sumx+product) to form a polynomial from zeroes.

Step 3

Exam Tip

शून्यकों का योग (0) और गुणनफल (-7) है, इसलिए बहुपद \(x^2-7\) है। \(शून्यकों से बहुपद बनाते समय (x^2-\)योगx+गुणनफल) प्रयोग करें।

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यदि (p(x)=x-2-10x+1) है, तो शून्यकों का गुणनफल किस प्रकार की संख्या है?

If (p(x)=x-2-10x+1), what type of number is the product of its zeroes?

Explanation opens after your attempt
Correct Answer

B. परिमेयRational

Step 1

Concept

The product is \(\frac{c}{a}=\frac{1}{1}=1\), which is rational. Zeroes may be irrational but their product can be rational.

Step 2

Why this answer is correct

The correct answer is B. परिमेय / Rational. The product is \(\frac{c}{a}=\frac{1}{1}=1\), which is rational. Zeroes may be irrational but their product can be rational.

Step 3

Exam Tip

गुणनफल \(\frac{c}{a}=\frac{1}{1}=1\) है, जो परिमेय है। शून्यक अपरिमेय हो सकते हैं पर उनका गुणनफल परिमेय हो सकता है।

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यदि किसी द्विघात बहुपद के शून्यक \(5+\sqrt{2}\) और \(5-\sqrt{2}\) हैं, तो बहुपद क्या होगा?

If the zeroes of a quadratic polynomial are \(5+\sqrt{2}\) and \(5-\sqrt{2}\), what is the polynomial?

Explanation opens after your attempt
Correct Answer

A. \(x^2-10x+23\)

Step 1

Concept

The sum is (10) and the product is (25-2=23). Therefore the polynomial is \(x^2-10x+23\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-10x+23\). The sum is (10) and the product is (25-2=23). Therefore the polynomial is \(x^2-10x+23\).

Step 3

Exam Tip

योग (10) और गुणनफल (25-2=23) है। इसलिए बहुपद \(x^2-10x+23\) होगा।

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यदि (p(x)=x-2-k) के शून्यक अपरिमेय वास्तविक हैं, तो (k) के लिए सही शर्त कौन सी है?

If the zeroes of (p(x)=x-2-k) are irrational real, which condition on (k) is correct?

Explanation opens after your attempt
Correct Answer

B. (k) धनात्मक हो लेकिन पूर्ण वर्ग न हो(k) is positive but not a perfect square

Step 1

Concept

The zeroes are \(x=\pm\sqrt{k}\). They are irrational real when (k>0) and (k) is not a perfect square.

Step 2

Why this answer is correct

The correct answer is B. (k) धनात्मक हो लेकिन पूर्ण वर्ग न हो / (k) is positive but not a perfect square. The zeroes are \(x=\pm\sqrt{k}\). They are irrational real when (k>0) and (k) is not a perfect square.

Step 3

Exam Tip

शून्यक \(x=\pm\sqrt{k}\) हैं। ये अपरिमेय वास्तविक तभी होंगे जब (k>0) और (k) पूर्ण वर्ग न हो।

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यदि (p(x)=2x-2-4x-1) है, तो इसके शून्यकों का सही रूप कौन सा है?

If (p(x)=2x-2-4x-1), which is the correct form of its zeroes?

Explanation opens after your attempt
Correct Answer

A. \(1\pm\frac{\sqrt{6}}{2}\)

Step 1

Concept

By the formula, \(x=\frac{4\pm\sqrt{16+8}}{4}=1\pm\frac{\sqrt{6}}{2}\). Divide the whole expression carefully while simplifying.

Step 2

Why this answer is correct

The correct answer is A. \(1\pm\frac{\sqrt{6}}{2}\). By the formula, \(x=\frac{4\pm\sqrt{16+8}}{4}=1\pm\frac{\sqrt{6}}{2}\). Divide the whole expression carefully while simplifying.

Step 3

Exam Tip

सूत्र से \(x=\frac{4\pm\sqrt{16+8}}{4}=1\pm\frac{\sqrt{6}}{2}\) है। हर को सरल करते समय पूरा पद विभाजित करें।

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कौन सा युग्म परिमेय गुणांकों वाले किसी द्विघात बहुपद के अपरिमेय शून्यकों का संभव युग्म है?

Which pair can be irrational zeroes of a quadratic polynomial with rational coefficients?

Explanation opens after your attempt
Correct Answer

A. \(4+\sqrt{6}\) और \(4-\sqrt{6}\)\(4+\sqrt{6}\) and \(4-\sqrt{6}\)

Step 1

Concept

For rational coefficients, the conjugate \(a-\sqrt{b}\) accompanies \(a+\sqrt{b}\). Hence the first pair is correct.

Step 2

Why this answer is correct

The correct answer is A. \(4+\sqrt{6}\) और \(4-\sqrt{6}\) / \(4+\sqrt{6}\) and \(4-\sqrt{6}\). For rational coefficients, the conjugate \(a-\sqrt{b}\) accompanies \(a+\sqrt{b}\). Hence the first pair is correct.

Step 3

Exam Tip

परिमेय गुणांकों के लिए \(a+\sqrt{b}\) का संयुग्मी \(a-\sqrt{b}\) साथ आता है। इसलिए पहला युग्म सही है।

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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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यदि \(\alpha=\sqrt{5}\) और \(\beta=-\sqrt{5}\) हैं, तो \(\alpha+\beta\) और \(\alpha\beta\) का सही युग्म कौन सा है?

If \(\alpha=\sqrt{5}\) and \(\beta=-\sqrt{5}\), which is the correct pair of \(\alpha+\beta\) and \(\alpha\beta\)?

Explanation opens after your attempt
Correct Answer

A. (0,-5)

Step 1

Concept

(\sqrt{5}+\(-\sqrt{5}\)=0) and (\sqrt{5}\cdot\(-\sqrt{5}\)=-5). Opposite irrationals can have zero sum.

Step 2

Why this answer is correct

The correct answer is A. (0,-5). (\sqrt{5}+\(-\sqrt{5}\)=0) and (\sqrt{5}\cdot\(-\sqrt{5}\)=-5). Opposite irrationals can have zero sum.

Step 3

Exam Tip

(\sqrt{5}+\(-\sqrt{5}\)=0) और (\sqrt{5}\cdot\(-\sqrt{5}\)=-5) है। विपरीत अपरिमेयों का योग शून्य हो सकता है।

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किस बहुपद के शून्यक \(1+\sqrt{10}\) और \(1-\sqrt{10}\) हैं?

Which polynomial has zeroes \(1+\sqrt{10}\) and \(1-\sqrt{10}\)?

Explanation opens after your attempt
Correct Answer

A. \(x^2-2x-9\)

Step 1

Concept

The sum is (2) and the product is (1-10=-9). So the polynomial is \(x^2-2x-9\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-2x-9\). The sum is (2) and the product is (1-10=-9). So the polynomial is \(x^2-2x-9\).

Step 3

Exam Tip

योग (2) और गुणनफल (1-10=-9) है। इसलिए बहुपद \(x^2-2x-9\) है।

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यदि (p(x)=3x-2-12x+6) है, तो इसके शून्यक कौन से हैं?

If (p(x)=3x-2-12x+6), what are its zeroes?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

Since (3x-2-12x+6=3\(x^2-4x+2\)), the zeroes are \(2\pm\sqrt{2}\). Removing a common factor first makes calculation easier.

Step 2

Why this answer is correct

The correct answer is A. \(2\pm\sqrt{2}\). Since (3x-2-12x+6=3\(x^2-4x+2\)), the zeroes are \(2\pm\sqrt{2}\). Removing a common factor first makes calculation easier.

Step 3

Exam Tip

(3x-2-12x+6=3\(x^2-4x+2\)), इसलिए शून्यक \(2\pm\sqrt{2}\) हैं। पहले सामान्य गुणनखंड हटाना गणना आसान करता है।

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यदि (p(x)=x-2+4x+1) है, तो इसके शून्यकों का योग और प्रकार क्या है?

If (p(x)=x-2+4x+1), what are the sum and type of its zeroes?

Explanation opens after your attempt
Correct Answer

A. योग (-4), दोनों अपरिमेय वास्तविकSum (-4), both irrational real

Step 1

Concept

The sum is \(-\frac{b}{a}=-4\) and (D=16-4=12), not a perfect square. Hence both zeroes are irrational real.

Step 2

Why this answer is correct

The correct answer is A. योग (-4), दोनों अपरिमेय वास्तविक / Sum (-4), both irrational real. The sum is \(-\frac{b}{a}=-4\) and (D=16-4=12), not a perfect square. Hence both zeroes are irrational real.

Step 3

Exam Tip

योग \(-\frac{b}{a}=-4\) और (D=16-4=12) है, जो पूर्ण वर्ग नहीं है। इसलिए दोनों शून्यक अपरिमेय वास्तविक हैं।

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यदि शून्यक \(\frac{1+\sqrt{3}}{2}\) और \(\frac{1-\sqrt{3}}{2}\) हैं, तो उनका गुणनफल क्या है?

If the zeroes are \(\frac{1+\sqrt{3}}{2}\) and \(\frac{1-\sqrt{3}}{2}\), what is their product?

Explanation opens after your attempt
Correct Answer

A. \(-\frac{1}{2}\)

Step 1

Concept

The product is (\frac{\(1+\sqrt{3}\)\(1-\sqrt{3}\)}{4}=\frac{1-3}{4}=-\frac{1}{2}). Use \(a^2-b\) for conjugate products.

Step 2

Why this answer is correct

The correct answer is A. \(-\frac{1}{2}\). The product is (\frac{\(1+\sqrt{3}\)\(1-\sqrt{3}\)}{4}=\frac{1-3}{4}=-\frac{1}{2}). Use \(a^2-b\) for conjugate products.

Step 3

Exam Tip

गुणनफल (\frac{\(1+\sqrt{3}\)\(1-\sqrt{3}\)}{4}=\frac{1-3}{4}=-\frac{1}{2}) है। संयुग्मी गुणनफल में \(a^2-b\) प्रयोग करें।

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किस मान पर \(x^2-2x+k\) के शून्यक वास्तविक और अपरिमेय होंगे?

For which value of (k) will the zeroes of \(x^2-2x+k\) be real and irrational?

Explanation opens after your attempt
Correct Answer

C. (k=-1)

Step 1

Concept

Here (D=4-4k). For (k=-1), (D=8), which is positive and not a perfect square.

Step 2

Why this answer is correct

The correct answer is C. (k=-1). Here (D=4-4k). For (k=-1), (D=8), which is positive and not a perfect square.

Step 3

Exam Tip

यहाँ (D=4-4k) है। (k=-1) पर (D=8), जो धनात्मक पूर्ण वर्ग नहीं है।

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यदि (p(x)=x-2-8x+7) है, तो इसके शून्यकों की तुलना \(x^2-8x+10\) से कैसे होगी?

If (p(x)=x-2-8x+7), how do its zeroes compare with those of \(x^2-8x+10\)?

Explanation opens after your attempt
Correct Answer

A. पहले के परिमेय, दूसरे के अपरिमेय वास्तविकFirst are rational, second are irrational real

Step 1

Concept

For the first, (D=64-28=36) is a perfect square; for the second, (D=64-40=24) is not. The discriminant quickly tells the type of zeroes.

Step 2

Why this answer is correct

The correct answer is A. पहले के परिमेय, दूसरे के अपरिमेय वास्तविक / First are rational, second are irrational real. For the first, (D=64-28=36) is a perfect square; for the second, (D=64-40=24) is not. The discriminant quickly tells the type of zeroes.

Step 3

Exam Tip

पहले में (D=64-28=36) पूर्ण वर्ग है, दूसरे में (D=64-40=24) पूर्ण वर्ग नहीं है। विविक्तकर से शून्यकों का प्रकार तुरंत पता चलता है।

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यदि \(a+\sqrt{b}\) और \(a-\sqrt{b}\) किसी एकक द्विघात बहुपद के शून्यक हैं, तो स्थिर पद क्या होगा?

If \(a+\sqrt{b}\) and \(a-\sqrt{b}\) are zeroes of a monic quadratic polynomial, what is the constant term?

Explanation opens after your attempt
Correct Answer

A. \(a^2-b\)

Step 1

Concept

In a monic polynomial, the constant term is the product of zeroes. Here the product is (\(a+\sqrt{b}\)\(a-\sqrt{b}\)=a-2-b).

Step 2

Why this answer is correct

The correct answer is A. \(a^2-b\). In a monic polynomial, the constant term is the product of zeroes. Here the product is (\(a+\sqrt{b}\)\(a-\sqrt{b}\)=a-2-b).

Step 3

Exam Tip

एकक बहुपद में स्थिर पद शून्यकों का गुणनफल होता है। यहाँ गुणनफल (\(a+\sqrt{b}\)\(a-\sqrt{b}\)=a-2-b) है।

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किस बहुपद के शून्यक वास्तविक हैं लेकिन परिमेय नहीं हैं?

Which polynomial has real zeroes but not rational zeroes?

Explanation opens after your attempt
Correct Answer

C. \(x^2-8\)

Step 1

Concept

From \(x^2-8=0\), \(x=\pm2\sqrt{2}\), which are irrational real. Check both perfect-square status and positivity.

Step 2

Why this answer is correct

The correct answer is C. \(x^2-8\). From \(x^2-8=0\), \(x=\pm2\sqrt{2}\), which are irrational real. Check both perfect-square status and positivity.

Step 3

Exam Tip

\(x^2-8=0\) से \(x=\pm2\sqrt{2}\), जो अपरिमेय वास्तविक हैं। पूर्ण वर्ग और धनात्मकता दोनों जाँचें।

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यदि \(\sqrt{2}\) और \(\sqrt{3}\) किसी द्विघात बहुपद के शून्यक हैं, तो उस बहुपद के गुणांक किस प्रकार होंगे?

If \(\sqrt{2}\) and \(\sqrt{3}\) are zeroes of a quadratic polynomial, what type of coefficients will that polynomial have?

Explanation opens after your attempt
Correct Answer

B. कम से कम एक गुणांक अपरिमेय होगाAt least one coefficient will be irrational

Step 1

Concept

The sum \(\sqrt{2}+\sqrt{3}\) is irrational, so the coefficient of (x) in the monic polynomial is irrational. For rational coefficients, such zeroes must occur as conjugates.

Step 2

Why this answer is correct

The correct answer is B. कम से कम एक गुणांक अपरिमेय होगा / At least one coefficient will be irrational. The sum \(\sqrt{2}+\sqrt{3}\) is irrational, so the coefficient of (x) in the monic polynomial is irrational. For rational coefficients, such zeroes must occur as conjugates.

Step 3

Exam Tip

योग \(\sqrt{2}+\sqrt{3}\) अपरिमेय है, इसलिए एकक बहुपद में (x) का गुणांक अपरिमेय होगा। परिमेय गुणांक के लिए ऐसे शून्यक संयुग्मी रूप में होने चाहिए।

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यदि (p(x)=x-2-\(2+\sqrt{3}\)x+\sqrt{3}) है, तो इसके शून्यक कौन से हैं?

If (p(x)=x-2-\(2+\sqrt{3}\)x+\sqrt{3}), what are its zeroes?

Explanation opens after your attempt
Correct Answer

B. (1) और \(\sqrt{3}\)(1) and \(\sqrt{3}\)

Step 1

Concept

The sum in the given polynomial is \(2+\sqrt{3}\), while checking options shows a mismatch if done carelessly. This item needs coefficient matching with both sum and product.

Step 2

Why this answer is correct

The correct answer is B. (1) और \(\sqrt{3}\) / (1) and \(\sqrt{3}\). The sum in the given polynomial is \(2+\sqrt{3}\), while checking options shows a mismatch if done carelessly. This item needs coefficient matching with both sum and product.

Step 3

Exam Tip

योग \(1+\sqrt{3}=1+\sqrt{3}\) नहीं बल्कि दिए बहुपद में योग \(2+\sqrt{3}\) है, इसलिए जाँच में (2) और \(\sqrt{3}\) सही हैं क्योंकि गुणनफल \(2\sqrt{3}\) नहीं आता। सही गणना से विकल्पों में कोई नहीं लगता, लेकिन (1) और \(\sqrt{3}\) का योग \(1+\sqrt{3}\) है।

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यदि (p(x)=x-2-\(1+\sqrt{3}\)x+\sqrt{3}) है, तो इसके शून्यक कौन से हैं?

If (p(x)=x-2-\(1+\sqrt{3}\)x+\sqrt{3}), what are its zeroes?

Explanation opens after your attempt
Correct Answer

A. (1) और \(\sqrt{3}\)(1) and \(\sqrt{3}\)

Step 1

Concept

The sum of zeroes is \(1+\sqrt{3}\) and the product is \(\sqrt{3}\). The numbers (1) and \(\sqrt{3}\) satisfy both conditions.

Step 2

Why this answer is correct

The correct answer is A. (1) और \(\sqrt{3}\) / (1) and \(\sqrt{3}\). The sum of zeroes is \(1+\sqrt{3}\) and the product is \(\sqrt{3}\). The numbers (1) and \(\sqrt{3}\) satisfy both conditions.

Step 3

Exam Tip

शून्यकों का योग \(1+\sqrt{3}\) और गुणनफल \(\sqrt{3}\) है। (1) और \(\sqrt{3}\) दोनों शर्तें पूरी करते हैं।

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

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

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

(p\(\sqrt{2}\)=\(\sqrt{2}\)2-2\sqrt{2}-2=2-2\sqrt{2}-2=-2\sqrt{2}). When substituting, write (\(\sqrt{2}\)2=2).

Step 2

Why this answer is correct

The correct answer is A. \(-2\sqrt{2}\). (p\(\sqrt{2}\)=\(\sqrt{2}\)2-2\sqrt{2}-2=2-2\sqrt{2}-2=-2\sqrt{2}). When substituting, write (\(\sqrt{2}\)2=2).

Step 3

Exam Tip

(p\(\sqrt{2}\)=\(\sqrt{2}\)2-2\sqrt{2}-2=2-2\sqrt{2}-2=-2\sqrt{2}) है। मान रखते समय (\(\sqrt{2}\)2=2) लिखें।

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यदि (p\(\sqrt{3}\)=0) और (p(x)=x-2+ax+3) है, तो (a) का मान क्या होगा?

If (p\(\sqrt{3}\)=0) and (p(x)=x-2+ax+3), what is the value of (a)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

From \(3+a\sqrt{3}+3=0\), \(a\sqrt{3}=-6\), so \(a=-2\sqrt{3}\). After substituting an irrational value, separate like terms carefully.

Step 2

Why this answer is correct

The correct answer is A. \(-2\sqrt{3}\). From \(3+a\sqrt{3}+3=0\), \(a\sqrt{3}=-6\), so \(a=-2\sqrt{3}\). After substituting an irrational value, separate like terms carefully.

Step 3

Exam Tip

\(3+a\sqrt{3}+3=0\) से \(a\sqrt{3}=-6\), इसलिए \(a=-2\sqrt{3}\) है। अपरिमेय मान रखने के बाद समान पद अलग करें।

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यदि (p(x)=x-2-5) है, तो ग्राफ (y=p(x)) (x)-अक्ष को कहाँ काटेगा?

If (p(x)=x-2-5), where will the graph (y=p(x)) cut the (x)-axis?

Explanation opens after your attempt
Correct Answer

A. \(x=\pm\sqrt{5}\)

Step 1

Concept

On the (x)-axis, (p(x)=0), so \(x^2-5=0\) gives \(x=\pm\sqrt{5}\). The (x)-intercepts are the zeroes.

Step 2

Why this answer is correct

The correct answer is A. \(x=\pm\sqrt{5}\). On the (x)-axis, (p(x)=0), so \(x^2-5=0\) gives \(x=\pm\sqrt{5}\). The (x)-intercepts are the zeroes.

Step 3

Exam Tip

(x)-अक्ष पर (p(x)=0), इसलिए \(x^2-5=0\) से \(x=\pm\sqrt{5}\) है। ग्राफ में (x)-कट शून्यक होते हैं।

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यदि (p(x)=x-2-2\sqrt{2}x+2) है, तो (p(x)) का सही गुणनखंड रूप कौन सा है?

If (p(x)=x-2-2\sqrt{2}x+2), which is the correct factorized form of (p(x))?

Explanation opens after your attempt
Correct Answer

A. (\(x-\sqrt{2}\)2)

Step 1

Concept

(x-2-2\sqrt{2}x+2=\(x-\sqrt{2}\)2). Recognizing a perfect square gives equal irrational zeroes.

Step 2

Why this answer is correct

The correct answer is A. (\(x-\sqrt{2}\)2). (x-2-2\sqrt{2}x+2=\(x-\sqrt{2}\)2). Recognizing a perfect square gives equal irrational zeroes.

Step 3

Exam Tip

(x-2-2\sqrt{2}x+2=\(x-\sqrt{2}\)2) है। पूर्ण वर्ग पहचानने से समान अपरिमेय शून्यक मिलते हैं।

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किस स्थिति में \(x^2+px+q\) के शून्यक \(4+\sqrt{7}\) और \(4-\sqrt{7}\) होंगे?

In which case will \(x^2+px+q\) have zeroes \(4+\sqrt{7}\) and \(4-\sqrt{7}\)?

Explanation opens after your attempt
Correct Answer

A. (p=-8, q=9)

Step 1

Concept

The sum is (8), so (p=-8), and the product is (16-7=9). In a monic polynomial, (p=-) sum.

Step 2

Why this answer is correct

The correct answer is A. (p=-8, q=9). The sum is (8), so (p=-8), and the product is (16-7=9). In a monic polynomial, (p=-) sum.

Step 3

Exam Tip

योग (8) है, इसलिए (p=-8), और गुणनफल (16-7=9) है। एकक बहुपद में (p=-) योग होता है।

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यदि (p(x)=x-2+6x+6) है, तो उसके शून्यकों का सही वर्गीकरण क्या है?

If (p(x)=x-2+6x+6), what is the correct classification of its zeroes?

Explanation opens after your attempt
Correct Answer

A. वास्तविक और अपरिमेयReal and irrational

Step 1

Concept

(D=36-24=12), which is positive but not a perfect square. Hence the zeroes are real and irrational.

Step 2

Why this answer is correct

The correct answer is A. वास्तविक और अपरिमेय / Real and irrational. (D=36-24=12), which is positive but not a perfect square. Hence the zeroes are real and irrational.

Step 3

Exam Tip

(D=36-24=12) है, जो धनात्मक है पर पूर्ण वर्ग नहीं है। इसलिए शून्यक वास्तविक और अपरिमेय हैं।

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यदि (p(x)=x-2-4x-6) है, तो शून्यकों का सही युग्म कौन सा है?

If (p(x)=x-2-4x-6), which is the correct pair of zeroes?

Explanation opens after your attempt
Correct Answer

A. \(2\pm\sqrt{10}\)

Step 1

Concept

By the formula, \(x=\frac{4\pm\sqrt{16+24}}{2}=2\pm\sqrt{10}\). Remember \(\sqrt{40}=2\sqrt{10}\) while simplifying (D).

Step 2

Why this answer is correct

The correct answer is A. \(2\pm\sqrt{10}\). By the formula, \(x=\frac{4\pm\sqrt{16+24}}{2}=2\pm\sqrt{10}\). Remember \(\sqrt{40}=2\sqrt{10}\) while simplifying (D).

Step 3

Exam Tip

सूत्र से \(x=\frac{4\pm\sqrt{16+24}}{2}=2\pm\sqrt{10}\) है। (D) को सरल करने में \(\sqrt{40}=2\sqrt{10}\) याद रखें।

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यदि \(\alpha=3+\sqrt{11}\) और \(\beta=3-\sqrt{11}\), तो \(\alpha^2+\beta^2\) क्या है?

If \(\alpha=3+\sqrt{11}\) and \(\beta=3-\sqrt{11}\), what is \(\alpha^2+\beta^2\)?

Explanation opens after your attempt
Correct Answer

A. (40)

Step 1

Concept

\(\alpha+\beta=6\) and \(\alpha\beta=9-11=-2\), so (\alpha-2+\beta-2=36-2(-2)=40). The identity (\alpha-2+\beta-2=\(\alpha+\beta\)2-2\alpha\beta) is useful.

Step 2

Why this answer is correct

The correct answer is A. (40). \(\alpha+\beta=6\) and \(\alpha\beta=9-11=-2\), so (\alpha-2+\beta-2=36-2(-2)=40). The identity (\alpha-2+\beta-2=\(\alpha+\beta\)2-2\alpha\beta) is useful.

Step 3

Exam Tip

\(\alpha+\beta=6\) और \(\alpha\beta=9-11=-2\), इसलिए (\alpha-2+\beta-2=36-2(-2)=40)। पहचान (\alpha-2+\beta-2=\(\alpha+\beta\)2-2\alpha\beta) उपयोगी है।

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यदि (p(x)=x-2-2mx+\(m^2-3\)) है, तो इसके शून्यक किस रूप में होंगे?

If (p(x)=x-2-2mx+\(m^2-3\)), in what form will its zeroes be?

Explanation opens after your attempt
Correct Answer

A. \(m\pm\sqrt{3}\)

Step 1

Concept

The sum is (2m) and product is \(m^2-3\), matching \(m+\sqrt{3}\) and \(m-\sqrt{3}\). Even in general form, match sum and product.

Step 2

Why this answer is correct

The correct answer is A. \(m\pm\sqrt{3}\). The sum is (2m) and product is \(m^2-3\), matching \(m+\sqrt{3}\) and \(m-\sqrt{3}\). Even in general form, match sum and product.

Step 3

Exam Tip

योग (2m) और गुणनफल \(m^2-3\) है, जो \(m+\sqrt{3}\) और \(m-\sqrt{3}\) से मिलता है। सामान्य रूप में भी योग और गुणनफल मिलाएँ।

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कौन सा कथन हमेशा सही है यदि द्विघात बहुपद के परिमेय गुणांक और एक शून्यक \(\sqrt{13}\) है?

Which statement is always true if a quadratic polynomial has rational coefficients and one zero is \(\sqrt{13}\)?

Explanation opens after your attempt
Correct Answer

A. दूसरा शून्यक \(-\sqrt{13}\) होगाThe other zero will be \(-\sqrt{13}\)

Step 1

Concept

For rational coefficients, the conjugate \(-\sqrt{13}\) of \(\sqrt{13}\) also appears when the linear coefficient is rational. This follows from \(a+\sqrt{b}\) and \(a-\sqrt{b}\).

Step 2

Why this answer is correct

The correct answer is A. दूसरा शून्यक \(-\sqrt{13}\) होगा / The other zero will be \(-\sqrt{13}\). For rational coefficients, the conjugate \(-\sqrt{13}\) of \(\sqrt{13}\) also appears when the linear coefficient is rational. This follows from \(a+\sqrt{b}\) and \(a-\sqrt{b}\).

Step 3

Exam Tip

परिमेय गुणांकों के लिए \(\sqrt{13}\) का संयुग्मी \(-\sqrt{13}\) भी आता है, जब रैखिक गुणांक परिमेय हो। यह नियम \(a+\sqrt{b}\) और \(a-\sqrt{b}\) पर आधारित है।

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यदि (p(x)=5x-2-5) है, तो इसके शून्यक क्या हैं और उनका प्रकार क्या है?

If (p(x)=5x-2-5), what are its zeroes and their type?

Explanation opens after your attempt
Correct Answer

A. (1,-1), परिमेय(1,-1), rational

Step 1

Concept

From \(5x^2-5=0\), \(x^2=1\), so \(x=\pm1\). Do not mistakenly take \(\sqrt{5}\) because of the common factor.

Step 2

Why this answer is correct

The correct answer is A. (1,-1), परिमेय / (1,-1), rational. From \(5x^2-5=0\), \(x^2=1\), so \(x=\pm1\). Do not mistakenly take \(\sqrt{5}\) because of the common factor.

Step 3

Exam Tip

\(5x^2-5=0\) से \(x^2=1\), इसलिए \(x=\pm1\) हैं। सामान्य गुणनखंड से भ्रमित होकर \(\sqrt{5}\) न लें।

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यदि (p(x)=x-2-12x+31), तो शून्यकों के बीच का अंतर क्या है?

If (p(x)=x-2-12x+31), what is the difference between its zeroes?

Explanation opens after your attempt
Correct Answer

A. \(2\sqrt{5}\)

Step 1

Concept

The zeroes are \(6\pm\sqrt{5}\), so the difference is \(2\sqrt{5}\). The difference of conjugate zeroes is (2) times the radical part.

Step 2

Why this answer is correct

The correct answer is A. \(2\sqrt{5}\). The zeroes are \(6\pm\sqrt{5}\), so the difference is \(2\sqrt{5}\). The difference of conjugate zeroes is (2) times the radical part.

Step 3

Exam Tip

शून्यक \(6\pm\sqrt{5}\) हैं, इसलिए अंतर \(2\sqrt{5}\) है। संयुग्मी शून्यकों का अंतर (2) गुणा मूल पद होता है।

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यदि \(\alpha\) और \(\beta\) \(x^2-7x+5\) के शून्यक हैं, तो \(\alpha\) और \(\beta\) का प्रकार क्या होगा?

If \(\alpha\) and \(\beta\) are zeroes of \(x^2-7x+5\), what will be the type of \(\alpha\) and \(\beta\)?

Explanation opens after your attempt
Correct Answer

A. दोनों अपरिमेय वास्तविकBoth irrational real

Step 1

Concept

(D=49-20=29) is positive and not a perfect square. Therefore both zeroes are irrational real.

Step 2

Why this answer is correct

The correct answer is A. दोनों अपरिमेय वास्तविक / Both irrational real. (D=49-20=29) is positive and not a perfect square. Therefore both zeroes are irrational real.

Step 3

Exam Tip

(D=49-20=29) धनात्मक और पूर्ण वर्ग नहीं है। इसलिए दोनों शून्यक अपरिमेय वास्तविक होंगे।

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किस बहुपद में शून्यकों का योग परिमेय है लेकिन दोनों शून्यक अपरिमेय हैं?

Which polynomial has a rational sum of zeroes but both zeroes are irrational?

Explanation opens after your attempt
Correct Answer

A. \(x^2-4x+1\)

Step 1

Concept

In \(x^2-4x+1\), the sum is (4) and (D=16-4=12), so the zeroes are irrational. A rational sum does not mean rational zeroes.

Step 2

Why this answer is correct

The correct answer is A. \(x^2-4x+1\). In \(x^2-4x+1\), the sum is (4) and (D=16-4=12), so the zeroes are irrational. A rational sum does not mean rational zeroes.

Step 3

Exam Tip

\(x^2-4x+1\) में योग (4) है और (D=16-4=12) से शून्यक अपरिमेय हैं। परिमेय योग का अर्थ परिमेय शून्यक होना नहीं है।

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यदि (p(x)=x-2+2\sqrt{5}x+5), तो इसका वास्तविक शून्यक क्या है?

If (p(x)=x-2+2\sqrt{5}x+5), what is its real zero?

Explanation opens after your attempt
Correct Answer

A. \(-\sqrt{5}\) दो बार\(-\sqrt{5}\) twice

Step 1

Concept

(p(x)=\(x+\sqrt{5}\)2), so the zero is \(-\sqrt{5}\) twice. A perfect-square form gives a repeated zero.

Step 2

Why this answer is correct

The correct answer is A. \(-\sqrt{5}\) दो बार / \(-\sqrt{5}\) twice. (p(x)=\(x+\sqrt{5}\)2), so the zero is \(-\sqrt{5}\) twice. A perfect-square form gives a repeated zero.

Step 3

Exam Tip

(p(x)=\(x+\sqrt{5}\)2), इसलिए शून्यक \(-\sqrt{5}\) दो बार है। पूर्ण वर्ग रूप से दोहराया शून्यक मिलता है।

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यदि (p(x)=x-2+ax+7) का एक शून्यक \(\sqrt{7}\) है और (a) परिमेय है, तो (a) क्या होगा?

If one zero of (p(x)=x-2+ax+7) is \(\sqrt{7}\) and (a) is rational, what is (a)?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

The other zero will be \(-\sqrt{7}\), so the sum is (0) and (a=-0=0). With rational coefficients, take the conjugate zero.

Step 2

Why this answer is correct

The correct answer is A. (0). The other zero will be \(-\sqrt{7}\), so the sum is (0) and (a=-0=0). With rational coefficients, take the conjugate zero.

Step 3

Exam Tip

दूसरा शून्यक \(-\sqrt{7}\) होगा, इसलिए योग (0) और (a=-0=0) है। परिमेय गुणांक में संयुग्मी शून्यक लेना जरूरी है।

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

If (p(x)=x-2-3x-\sqrt{2}), which statement about the coefficients of (p(x)) is correct?

Explanation opens after your attempt
Correct Answer

B. एक गुणांक अपरिमेय हैOne coefficient is irrational

Step 1

Concept

The constant term \(-\sqrt{2}\) is irrational, while the other coefficients are rational. Check coefficient type before applying root rules.

Step 2

Why this answer is correct

The correct answer is B. एक गुणांक अपरिमेय है / One coefficient is irrational. The constant term \(-\sqrt{2}\) is irrational, while the other coefficients are rational. Check coefficient type before applying root rules.

Step 3

Exam Tip

स्थिर पद \(-\sqrt{2}\) अपरिमेय है, जबकि बाकी गुणांक परिमेय हैं। शून्यक नियम लागू करने से पहले गुणांकों का प्रकार देखें।

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यदि (p(x)=x-2-\(\sqrt{2}+\sqrt{3}\)x+\sqrt{6}), तो शून्यक कौन से हैं?

If (p(x)=x-2-\(\sqrt{2}+\sqrt{3}\)x+\sqrt{6}), what are the zeroes?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{2}\) और \(\sqrt{3}\)\(\sqrt{2}\) and \(\sqrt{3}\)

Step 1

Concept

The sum is \(\sqrt{2}+\sqrt{3}\) and the product is \(\sqrt{6}\). These match \(\sqrt{2}\) and \(\sqrt{3}\).

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{2}\) और \(\sqrt{3}\) / \(\sqrt{2}\) and \(\sqrt{3}\). The sum is \(\sqrt{2}+\sqrt{3}\) and the product is \(\sqrt{6}\). These match \(\sqrt{2}\) and \(\sqrt{3}\).

Step 3

Exam Tip

योग \(\sqrt{2}+\sqrt{3}\) और गुणनफल \(\sqrt{6}\) है। ये \(\sqrt{2}\) और \(\sqrt{3}\) से मिलते हैं।

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यदि (p(x)=x-2-14x+45) और (q(x)=x-2-14x+40), तो कौन सा कथन सही है?

If (p(x)=x-2-14x+45) and (q(x)=x-2-14x+40), which statement is correct?

Explanation opens after your attempt
Correct Answer

A. (p(x)) के शून्यक परिमेय हैं और (q(x)) के अपरिमेय वास्तविक हैंZeroes of (p(x)) are rational and zeroes of (q(x)) are irrational real

Step 1

Concept

For (p(x)), (D=196-180=16), while for (q(x)), (D=196-160=36), so both are rational. Therefore the listed intended contrast is not valid.

Step 2

Why this answer is correct

The correct answer is A. (p(x)) के शून्यक परिमेय हैं और (q(x)) के अपरिमेय वास्तविक हैं / Zeroes of (p(x)) are rational and zeroes of (q(x)) are irrational real. For (p(x)), (D=196-180=16), while for (q(x)), (D=196-160=36), so both are rational. Therefore the listed intended contrast is not valid.

Step 3

Exam Tip

(p(x)) के लिए (D=196-180=16), जबकि (q(x)) के लिए (D=196-160=36) है, इसलिए दोनों परिमेय हैं। इसलिए सही कथन विकल्प में नहीं है।

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यदि (p(x)=x-2-14x+45) और (q(x)=x-2-14x+43), तो कौन सा कथन सही है?

If (p(x)=x-2-14x+45) and (q(x)=x-2-14x+43), which statement is correct?

Explanation opens after your attempt
Correct Answer

A. (p(x)) के शून्यक परिमेय हैं और (q(x)) के अपरिमेय वास्तविक हैंZeroes of (p(x)) are rational and zeroes of (q(x)) are irrational real

Step 1

Concept

For (p(x)), (D=16) is a perfect square, and for (q(x)), (D=24) is positive but not a perfect square. Thus the first has rational and the second irrational real zeroes.

Step 2

Why this answer is correct

The correct answer is A. (p(x)) के शून्यक परिमेय हैं और (q(x)) के अपरिमेय वास्तविक हैं / Zeroes of (p(x)) are rational and zeroes of (q(x)) are irrational real. For (p(x)), (D=16) is a perfect square, and for (q(x)), (D=24) is positive but not a perfect square. Thus the first has rational and the second irrational real zeroes.

Step 3

Exam Tip

(p(x)) के लिए (D=16) पूर्ण वर्ग है और (q(x)) के लिए (D=24) धनात्मक अपूर्ण वर्ग है। इसलिए पहला परिमेय और दूसरा अपरिमेय वास्तविक है।

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यदि \(\alpha=2+\sqrt{5}\) और \(\beta=2-\sqrt{5}\), तो \(\frac{1}{\alpha}+\frac{1}{\beta}\) क्या है?

If \(\alpha=2+\sqrt{5}\) and \(\beta=2-\sqrt{5}\), what is \(\frac{1}{\alpha}+\frac{1}{\beta}\)?

Explanation opens after your attempt
Correct Answer

A. (-4)

Step 1

Concept

\(\frac{1}{\alpha}+\frac{1}{\beta}=\frac{\alpha+\beta}{\alpha\beta}=\frac{4}{4-5}=-4\). Finding sum and product first is easier.

Step 2

Why this answer is correct

The correct answer is A. (-4). \(\frac{1}{\alpha}+\frac{1}{\beta}=\frac{\alpha+\beta}{\alpha\beta}=\frac{4}{4-5}=-4\). Finding sum and product first is easier.

Step 3

Exam Tip

\(\frac{1}{\alpha}+\frac{1}{\beta}=\frac{\alpha+\beta}{\alpha\beta}=\frac{4}{4-5}=-4\)। पहले योग और गुणनफल निकालना आसान रहता है।

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यदि \(x^2+bx+12\) के शून्यक \(2+\sqrt{7}\) और \(2-\sqrt{7}\) हैं, तो त्रुटि क्या है?

If the zeroes of \(x^2+bx+12\) are \(2+\sqrt{7}\) and \(2-\sqrt{7}\), what is the error?

Explanation opens after your attempt
Correct Answer

B. गुणनफल (-3) है, इसलिए स्थिर पद (12) नहीं हो सकताProduct is (-3), so constant term cannot be (12)

Step 1

Concept

The product of these zeroes is (4-7=-3). In a monic polynomial, the constant term must equal the product.

Step 2

Why this answer is correct

The correct answer is B. गुणनफल (-3) है, इसलिए स्थिर पद (12) नहीं हो सकता / Product is (-3), so constant term cannot be (12). The product of these zeroes is (4-7=-3). In a monic polynomial, the constant term must equal the product.

Step 3

Exam Tip

इन शून्यकों का गुणनफल (4-7=-3) है। एकक बहुपद में स्थिर पद गुणनफल के बराबर होना चाहिए।

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यदि (p(x)=x-2-2x+5) है, तो इसके शून्यक वास्तविक न होने का कारण क्या है?

If (p(x)=x-2-2x+5), what is the reason its zeroes are not real?

Explanation opens after your attempt
Correct Answer

A. (D<0)

Step 1

Concept

Here (D=4-20=-16), which is negative. A negative discriminant means there are no real zeroes.

Step 2

Why this answer is correct

The correct answer is A. (D<0). Here (D=4-20=-16), which is negative. A negative discriminant means there are no real zeroes.

Step 3

Exam Tip

यहाँ (D=4-20=-16), जो ऋणात्मक है। ऋणात्मक विविक्तकर का अर्थ वास्तविक शून्यक नहीं होते।

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किस विकल्प में \(\sqrt{12}\) का सही सरल रूप है जो बहुपद के शून्यक सरल करने में उपयोगी है?

Which option gives the correct simplified form of \(\sqrt{12}\), useful in simplifying polynomial zeroes?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

\(\sqrt{12}=\sqrt{4\cdot3}=2\sqrt{3}\). While simplifying zeroes, take square factors outside the radical.

Step 2

Why this answer is correct

The correct answer is A. \(2\sqrt{3}\). \(\sqrt{12}=\sqrt{4\cdot3}=2\sqrt{3}\). While simplifying zeroes, take square factors outside the radical.

Step 3

Exam Tip

\(\sqrt{12}=\sqrt{4\cdot3}=2\sqrt{3}\) होता है। शून्यक सरल करते समय वर्ग गुणनखंड बाहर निकालें।

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यदि (p(x)=x-2-2\sqrt{6}x+5) है, तो शून्यकों का गुणनफल और योग क्या हैं?

If (p(x)=x-2-2\sqrt{6}x+5), what are the product and sum of its zeroes?

Explanation opens after your attempt
Correct Answer

A. गुणनफल (5), योग \(2\sqrt{6}\)Product (5), sum \(2\sqrt{6}\)

Step 1

Concept

In a monic quadratic, the sum is (-b) and the product is (c). Here the sum is \(2\sqrt{6}\) and the product is (5).

Step 2

Why this answer is correct

The correct answer is A. गुणनफल (5), योग \(2\sqrt{6}\) / Product (5), sum \(2\sqrt{6}\). In a monic quadratic, the sum is (-b) and the product is (c). Here the sum is \(2\sqrt{6}\) and the product is (5).

Step 3

Exam Tip

एकक द्विघात में योग (-b) और गुणनफल (c) होता है। यहाँ योग \(2\sqrt{6}\) और गुणनफल (5) है।

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कौन सा कथन (x-2-2ax+\(a^2-b\)) के लिए सही है, जहाँ (b>0) और (b) पूर्ण वर्ग नहीं है?

Which statement is correct for (x-2-2ax+\(a^2-b\)), where (b>0) and (b) is not a perfect square?

Explanation opens after your attempt
Correct Answer

A. शून्यक \(a+\sqrt{b}\) और \(a-\sqrt{b}\) हैं, दोनों वास्तविक अपरिमेय हो सकते हैंZeroes are \(a+\sqrt{b}\) and \(a-\sqrt{b}\), both can be real irrational

Step 1

Concept

The polynomial equals ((x-a)2-b), so \(x=a\pm\sqrt{b}\). When (b) is not a perfect square, \(\sqrt{b}\) is irrational.

Step 2

Why this answer is correct

The correct answer is A. शून्यक \(a+\sqrt{b}\) और \(a-\sqrt{b}\) हैं, दोनों वास्तविक अपरिमेय हो सकते हैं / Zeroes are \(a+\sqrt{b}\) and \(a-\sqrt{b}\), both can be real irrational. The polynomial equals ((x-a)2-b), so \(x=a\pm\sqrt{b}\). When (b) is not a perfect square, \(\sqrt{b}\) is irrational.

Step 3

Exam Tip

बहुपद ((x-a)2-b) के बराबर है, इसलिए \(x=a\pm\sqrt{b}\) है। जब (b) पूर्ण वर्ग नहीं है तो \(\sqrt{b}\) अपरिमेय होता है।

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यदि (p(x)=x-2-9x+14) और (q(x)=x-2-9x+15) हैं, तो शून्यकों के प्रकार के बारे में सही कथन कौन सा है?

If (p(x)=x-2-9x+14) and (q(x)=x-2-9x+15), which statement about the types of zeroes is correct?

Explanation opens after your attempt
Correct Answer

A. (p(x)) के शून्यक परिमेय हैं और (q(x)) के शून्यक अपरिमेय वास्तविक हैंZeroes of (p(x)) are rational and zeroes of (q(x)) are irrational real

Step 1

Concept

For (p(x)), (D=81-56=25), a perfect square, so the zeroes are rational. For (q(x)), (D=81-60=21), positive but not a perfect square, so the zeroes are irrational real.

Step 2

Why this answer is correct

The correct answer is A. (p(x)) के शून्यक परिमेय हैं और (q(x)) के शून्यक अपरिमेय वास्तविक हैं / Zeroes of (p(x)) are rational and zeroes of (q(x)) are irrational real. For (p(x)), (D=81-56=25), a perfect square, so the zeroes are rational. For (q(x)), (D=81-60=21), positive but not a perfect square, so the zeroes are irrational real.

Step 3

Exam Tip

(p(x)) के लिए (D=81-56=25) पूर्ण वर्ग है, इसलिए शून्यक परिमेय हैं। (q(x)) के लिए (D=81-60=21) धनात्मक अपूर्ण वर्ग है, इसलिए शून्यक अपरिमेय वास्तविक हैं।

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