Search Class 10 Questions

100 results found for "Coefficients" in Class 10.

(p(x)=6x-6-5x-5+4x-3-2x-2+x-7) में विषम घात वाले पदों के गुणांकों का योग क्या है?

What is the sum of coefficients of odd-power terms in (p(x)=6x-6-5x-5+4x-3-2x-2+x-7)?

Explanation opens after your attempt
Correct Answer

B. (0)

Step 1

Concept

The coefficients of odd powers \(x^5\), \(x^3\), and (x) are (-5), (4), and (1). Their sum is (0).

Step 2

Why this answer is correct

The correct answer is B. (0). The coefficients of odd powers \(x^5\), \(x^3\), and (x) are (-5), (4), and (1). Their sum is (0).

Step 3

Exam Tip

विषम घातों \(x^5\), \(x^3\) और (x) के गुणांक (-5), (4) और (1) हैं। उनका योग (0) है।

Open Question Page
Ask Friends

यदि (p(x)=4x-4+kx-3-6x+1) में सभी गुणांकों का योग (5) है, तो (k) क्या है?

If the sum of all coefficients of (p(x)=4x-4+kx-3-6x+1) is (5), what is (k)?

Explanation opens after your attempt
Correct Answer

C. (6)

Step 1

Concept

The sum of coefficients is (4+k+0-6+1=k-1), so (k-1=5) and (k=6). The sum of coefficients is found by (p(1)).

Step 2

Why this answer is correct

The correct answer is C. (6). The sum of coefficients is (4+k+0-6+1=k-1), so (k-1=5) and (k=6). The sum of coefficients is found by (p(1)).

Step 3

Exam Tip

गुणांकों का योग (4+k+0-6+1=k-1) है, इसलिए (k-1=5) और (k=6)। गुणांकों का योग (p(1)) से मिलता है।

Open Question Page
Ask Friends

(p(x)=8x-4-3x-3-4x+2) में सभी गुणांकों का योग क्या है?

What is the sum of all coefficients in (p(x)=8x-4-3x-3-4x+2)?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

The sum of all coefficients is (8-3+0-4+2=3). It is also equal to (p(1)).

Step 2

Why this answer is correct

The correct answer is C. (3). The sum of all coefficients is (8-3+0-4+2=3). It is also equal to (p(1)).

Step 3

Exam Tip

सभी गुणांकों का योग (8-3+0-4+2=3) है। यह (p(1)) के बराबर भी होता है।

Open Question Page
Ask Friends

(p(x)=5x-5-3x-4+2x-3-x+6) में विषम घात वाले पदों के गुणांकों का योग क्या है?

What is the sum of coefficients of odd-power terms in (p(x)=5x-5-3x-4+2x-3-x+6)?

Explanation opens after your attempt
Correct Answer

C. (6)

Step 1

Concept

The coefficients of odd powers \(x^5\), \(x^3\), and (x) are (5), (2), and (-1). Their sum is (6).

Step 2

Why this answer is correct

The correct answer is C. (6). The coefficients of odd powers \(x^5\), \(x^3\), and (x) are (5), (2), and (-1). Their sum is (6).

Step 3

Exam Tip

विषम घातों \(x^5\), \(x^3\) और (x) के गुणांक (5), (2) और (-1) हैं। उनका योग (6) है।

Open Question Page
Ask Friends

यदि बहुपद (p(x)=3x-3+kx-2-7x+2) में सभी गुणांकों का योग (5) है, तो (k) क्या है?

If the sum of all coefficients of (p(x)=3x-3+kx-2-7x+2) is (5), what is (k)?

Explanation opens after your attempt
Correct Answer

C. (7)

Step 1

Concept

The sum of coefficients is (3+k-7+2=k-2), so (k-2=5) and (k=7). The sum of coefficients is (p(1)).

Step 2

Why this answer is correct

The correct answer is C. (7). The sum of coefficients is (3+k-7+2=k-2), so (k-2=5) and (k=7). The sum of coefficients is (p(1)).

Step 3

Exam Tip

गुणांकों का योग (3+k-7+2=k-2) है, इसलिए (k-2=5) और (k=7)। गुणांकों का योग (p(1)) होता है।

Open Question Page
Ask Friends

(p(x)=7x-3-4x-2-2x-1) में सभी गुणांकों का योग क्या है?

What is the sum of all coefficients in (p(x)=7x-3-4x-2-2x-1)?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

The sum of all coefficients is (7-4-2-1=0). It is also equal to (p(1)).

Step 2

Why this answer is correct

The correct answer is A. (0). The sum of all coefficients is (7-4-2-1=0). It is also equal to (p(1)).

Step 3

Exam Tip

सभी गुणांकों का योग (7-4-2-1=0) है। यह (p(1)) के बराबर भी होता है।

Open Question Page
Ask Friends

(p(x)=3x-4-5x-2+2x-7) में विषम घात वाले पदों के गुणांकों का योग क्या है?

What is the sum of coefficients of the odd-power terms in (p(x)=3x-4-5x-2+2x-7)?

Explanation opens after your attempt
Correct Answer

C. (2)

Step 1

Concept

The only odd-power term is (2x), so the sum is (2). Do not treat \(x^0\) as an odd power.

Step 2

Why this answer is correct

The correct answer is C. (2). The only odd-power term is (2x), so the sum is (2). Do not treat \(x^0\) as an odd power.

Step 3

Exam Tip

विषम घात वाला केवल (2x) पद है, इसलिए योग (2) है। \(x^0\) को विषम घात न मानें।

Open Question Page
Ask Friends

यदि बहुपद (p(x)=2x-3+kx-2-8x+3) में सभी गुणांकों का योग (0) है, तो (k) क्या है?

If the sum of all coefficients of (p(x)=2x-3+kx-2-8x+3) is (0), what is (k)?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

The sum of coefficients is (2+k-8+3=k-3), so (k=3). The sum of coefficients can also be found by (p(1)).

Step 2

Why this answer is correct

The correct answer is C. (3). The sum of coefficients is (2+k-8+3=k-3), so (k=3). The sum of coefficients can also be found by (p(1)).

Step 3

Exam Tip

गुणांकों का योग (2+k-8+3=k-3) है, इसलिए (k=3)। गुणांकों का योग (p(1)) से भी मिलता है।

Open Question Page
Ask Friends

(p(x)=5x-3-2x-2+x-4) में सभी गुणांकों का योग क्या है?

What is the sum of all coefficients in (p(x)=5x-3-2x-2+x-4)?

Explanation opens after your attempt
Correct Answer

A. (0)

Step 1

Concept

The sum of all coefficients is (5-2+1-4=0). It is also equal to (p(1)).

Step 2

Why this answer is correct

The correct answer is A. (0). The sum of all coefficients is (5-2+1-4=0). It is also equal to (p(1)).

Step 3

Exam Tip

सभी गुणांकों का योग (5-2+1-4=0) है। यह (p(1)) के बराबर भी होता है।

Open Question Page
Ask Friends

\(5x^2-6x+2\) और \(2x^2+9x-1\) में (x) के गुणांकों का योग क्या है?

What is the sum of the coefficients of (x) in \(5x^2-6x+2\) and \(2x^2+9x-1\)?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

The coefficient of (x) is (-6) in the first polynomial and (9) in the second, so the sum is (3). Add coefficients of like powers only.

Step 2

Why this answer is correct

The correct answer is C. (3). The coefficient of (x) is (-6) in the first polynomial and (9) in the second, so the sum is (3). Add coefficients of like powers only.

Step 3

Exam Tip

पहले बहुपद में (x) का गुणांक (-6) और दूसरे में (9) है, योग (3) है। समान घात के गुणांक ही जोड़ें।

Open Question Page
Ask Friends

\(3x^2-2x+1\) और \(x^2+4x+7\) में (x) के गुणांकों का योग क्या है?

What is the sum of the coefficients of (x) in \(3x^2-2x+1\) and \(x^2+4x+7\)?

Explanation opens after your attempt
Correct Answer

A. (2)

Step 1

Concept

The coefficient of (x) is (-2) in the first polynomial and (4) in the second, so the sum is (2). Add coefficients of like powers only.

Step 2

Why this answer is correct

The correct answer is A. (2). The coefficient of (x) is (-2) in the first polynomial and (4) in the second, so the sum is (2). Add coefficients of like powers only.

Step 3

Exam Tip

पहले बहुपद में (x) का गुणांक (-2) और दूसरे में (4) है, योग (2) है। समान घात के गुणांक ही जोड़ें।

Open Question Page
Ask Friends

बहुपद (p(x)=3x-2+4x+5) में कुल कितने गुणांक हैं जब इसे \(ax^2+bx+c\) रूप में देखें?

How many coefficients are there in (p(x)=3x-2+4x+5) when viewed as \(ax^2+bx+c\)?

Explanation opens after your attempt
Correct Answer

C. (3)

Step 1

Concept

In \(ax^2+bx+c\), there are three coefficients (a), (b), and (c). Here they are (3), (4), and (5).

Step 2

Why this answer is correct

The correct answer is C. (3). In \(ax^2+bx+c\), there are three coefficients (a), (b), and (c). Here they are (3), (4), and (5).

Step 3

Exam Tip

\(ax^2+bx+c\) में (a), (b) और (c) तीन गुणांक होते हैं। यहाँ वे (3), (4) और (5) हैं।

Open Question Page
Ask Friends

समीकरण \(\frac{3}{4}x^2-\frac{1}{2}x+2=0\) का पूर्णांक गुणांकों वाला रूप कौन-सा है?

What is the form with integer coefficients for \(\frac{3}{4}x^2-\frac{1}{2}x+2=0\)?

Explanation opens after your attempt
Correct Answer

A. \(3x^2-2x+8=0\)

Step 1

Concept

Multiply the whole equation by (4) to remove the denominators. This gives \(3x^2-2x+8=0\).

Step 2

Why this answer is correct

The correct answer is A. \(3x^2-2x+8=0\). Multiply the whole equation by (4) to remove the denominators. This gives \(3x^2-2x+8=0\).

Step 3

Exam Tip

हर हटाने के लिए पूरे समीकरण को (4) से गुणा करें। इससे \(3x^2-2x+8=0\) मिलता है।

Open Question Page
Ask Friends

समीकरण \(\frac{2}{5}x^2+\frac{1}{5}x-2=0\) का पूर्णांक गुणांकों वाला रूप कौन-सा है?

What is the form with integer coefficients for \(\frac{2}{5}x^2+\frac{1}{5}x-2=0\)?

Explanation opens after your attempt
Correct Answer

A. \(2x^2+x-10=0\)

Step 1

Concept

Multiply the whole equation by (5) to remove denominator (5). This gives \(2x^2+x-10=0\).

Step 2

Why this answer is correct

The correct answer is A. \(2x^2+x-10=0\). Multiply the whole equation by (5) to remove denominator (5). This gives \(2x^2+x-10=0\).

Step 3

Exam Tip

हर (5) हटाने के लिए पूरे समीकरण को (5) से गुणा करें। इससे \(2x^2+x-10=0\) मिलता है।

Open Question Page
Ask Friends

समीकरण \(\frac{1}{3}x^2-\frac{2}{3}x+1=0\) का पूर्णांक गुणांकों वाला रूप कौन-सा है?

What is the form with integer coefficients for \(\frac{1}{3}x^2-\frac{2}{3}x+1=0\)?

Explanation opens after your attempt
Correct Answer

A. \(x^2-2x+3=0\)

Step 1

Concept

Multiply the whole equation by (3) to remove the denominator (3). This gives \(x^2-2x+3=0\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-2x+3=0\). Multiply the whole equation by (3) to remove the denominator (3). This gives \(x^2-2x+3=0\).

Step 3

Exam Tip

हर (3) हटाने के लिए पूरे समीकरण को (3) से गुणा करें। इससे \(x^2-2x+3=0\) मिलता है।

Open Question Page
Ask Friends

किस विकल्प में परिमेय गुणांकों वाला द्विघात बहुपद बन सकता है?

Which option can form a quadratic polynomial with rational coefficients?

Explanation opens after your attempt
Correct Answer

A. शून्यक \(6+\sqrt{5}\) और \(6-\sqrt{5}\)Zeroes \(6+\sqrt{5}\) and \(6-\sqrt{5}\)

Step 1

Concept

With rational coefficients, irrational parts occur in conjugate pairs. Only \(6+\sqrt{5}\) and \(6-\sqrt{5}\) have both rational sum and rational product.

Step 2

Why this answer is correct

The correct answer is A. शून्यक \(6+\sqrt{5}\) और \(6-\sqrt{5}\) / Zeroes \(6+\sqrt{5}\) and \(6-\sqrt{5}\). With rational coefficients, irrational parts occur in conjugate pairs. Only \(6+\sqrt{5}\) and \(6-\sqrt{5}\) have both rational sum and rational product.

Step 3

Exam Tip

परिमेय गुणांकों में अपरिमेय भाग संयुग्मी जोड़े में आता है। केवल \(6+\sqrt{5}\) और \(6-\sqrt{5}\) का योग और गुणनफल दोनों परिमेय हैं।

Open Question Page
Ask Friends

यदि किसी परिमेय गुणांकों वाले द्विघात बहुपद का एक शून्यक \(\frac{3+\sqrt{5}}{2}\) है, तो दूसरा शून्यक क्या होगा?

If one zero of a quadratic polynomial with rational coefficients is \(\frac{3+\sqrt{5}}{2}\), what will be the other zero?

Explanation opens after your attempt
Correct Answer

A. \(\frac{3-\sqrt{5}}{2}\)

Step 1

Concept

With rational coefficients, the conjugate of the irrational part is also a zero. Hence \(\frac{3-\sqrt{5}}{2}\) is the other zero.

Step 2

Why this answer is correct

The correct answer is A. \(\frac{3-\sqrt{5}}{2}\). With rational coefficients, the conjugate of the irrational part is also a zero. Hence \(\frac{3-\sqrt{5}}{2}\) is the other zero.

Step 3

Exam Tip

परिमेय गुणांकों में अपरिमेय भाग का संयुग्मी भी शून्यक होता है। इसलिए \(\frac{3-\sqrt{5}}{2}\) दूसरा शून्यक है।

Open Question Page
Ask Friends

यदि \(2+\sqrt{13}\) परिमेय गुणांकों वाले द्विघात बहुपद का एक शून्यक है, तो उस बहुपद में (x) का गुणांक किस रूप में हो सकता है?

If \(2+\sqrt{13}\) is one zero of a quadratic polynomial with rational coefficients, what can the coefficient of (x) be?

Explanation opens after your attempt
Correct Answer

A. (-4)

Step 1

Concept

The other zero will be \(2-\sqrt{13}\), so the sum is (4). In a monic polynomial, the coefficient of (x) will be (-4).

Step 2

Why this answer is correct

The correct answer is A. (-4). The other zero will be \(2-\sqrt{13}\), so the sum is (4). In a monic polynomial, the coefficient of (x) will be (-4).

Step 3

Exam Tip

दूसरा शून्यक \(2-\sqrt{13}\) होगा, इसलिए योग (4) है। एकक बहुपद में (x) का गुणांक (-4) होगा।

Open Question Page
Ask Friends

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।

Open Question Page
Ask Friends

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।

Open Question Page
Ask Friends

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।

Open Question Page
Ask Friends

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।

Open Question Page
Ask Friends

किस विकल्प में दिया बहुपद परिमेय गुणांकों वाला है और उसके शून्यक अपरिमेय संयुग्मी हैं?

Which option gives a polynomial with rational coefficients and irrational conjugate zeroes?

Explanation opens after your attempt
Correct Answer

A. \(x^2-6x+7\)

Step 1

Concept

For \(x^2-6x+7\), (D=36-28=8). The coefficients are rational and the zeroes are \(3\pm\sqrt{2}\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-6x+7\). For \(x^2-6x+7\), (D=36-28=8). The coefficients are rational and the zeroes are \(3\pm\sqrt{2}\).

Step 3

Exam Tip

\(x^2-6x+7\) में (D=36-28=8) है। गुणांक परिमेय हैं और शून्यक \(3\pm\sqrt{2}\) होंगे।

Open Question Page
Ask Friends

यदि किसी द्विघात बहुपद के परिमेय गुणांक हैं और शून्यक \(4+\sqrt{11}\) है, तो शून्यकों का योग क्या होगा?

If a quadratic polynomial has rational coefficients and one zero is \(4+\sqrt{11}\), what will be the sum of its zeroes?

Explanation opens after your attempt
Correct Answer

A. (8)

Step 1

Concept

The other zero will be \(4-\sqrt{11}\). The sum is (\(4+\sqrt{11}\)+\(4-\sqrt{11}\)=8).

Step 2

Why this answer is correct

The correct answer is A. (8). The other zero will be \(4-\sqrt{11}\). The sum is (\(4+\sqrt{11}\)+\(4-\sqrt{11}\)=8).

Step 3

Exam Tip

दूसरा शून्यक \(4-\sqrt{11}\) होगा। योग (\(4+\sqrt{11}\)+\(4-\sqrt{11}\)=8) है।

Open Question Page
Ask Friends

संतुलन करते समय गुणांक बदलना छोटे अंक बदलने से सुरक्षित क्यों है?

Why is changing coefficients safer than changing subscripts during balancing?

Explanation opens after your attempt
Correct Answer

A. गुणांक कणों की संख्या बदलते हैं पदार्थ की पहचान नहींCoefficients change number of particles not identity

Step 1

Concept

Subscripts show the composition of a substance.

Step 2

Why this answer is correct

Changing them changes the substance.

Step 3

Exam Tip

Changing coefficients changes only the number of particles. चरण 1: छोटे अंक पदार्थ की रचना बताते हैं। चरण 2: उन्हें बदलने से पदार्थ बदल जाता है। चरण 3: गुणांक बदलने से केवल संख्या बदलती है।

Open Question Page
Ask Friends

संतुलित समीकरण बनाने में गुणांक बदलना छोटे अंक बदलने से बेहतर क्यों है?

Why is changing coefficients better than changing subscripts while making a balanced equation?

Explanation opens after your attempt
Correct Answer

A. गुणांक पदार्थ की मात्रा बदलते हैं पहचान नहींCoefficients change amount not identity

Step 1

Concept

Subscripts show the composition of a substance.

Step 2

Why this answer is correct

Coefficients show only the number of molecules or units.

Step 3

Exam Tip

Therefore changing coefficients is the correct method for balancing. चरण 1: छोटे अंक पदार्थ की रचना बताते हैं। चरण 2: गुणांक केवल अणुओं या कणों की संख्या बताते हैं। चरण 3: इसलिए संतुलन में गुणांक बदलना सही विधि है।

Open Question Page
Ask Friends

समीकरण संतुलित करते समय रासायनिक सूत्रों के बजाय गुणांक क्यों बदले जाते हैं?

Why are coefficients changed instead of chemical formulae while balancing equations?

Explanation opens after your attempt
Correct Answer

A. क्योंकि सूत्र बदलने से पदार्थ बदल जाता हैBecause changing formulae changes the substance

Step 1

Concept

Chemical formulae show the correct composition of substances.

Step 2

Why this answer is correct

Changing a formula changes the identity of the substance.

Step 3

Exam Tip

Changing only coefficients is the correct way to balance. चरण 1: रासायनिक सूत्र पदार्थ की सही संरचना बताते हैं। चरण 2: सूत्र बदलने से पदार्थ की पहचान बदल जाती है। चरण 3: संतुलन के लिए केवल गुणांक बदलना सही तरीका है।

Open Question Page
Ask Friends

समीकरण संतुलित करते समय गुणांक कहाँ लगाए जाते हैं?

Where are coefficients placed while balancing an equation?

Explanation opens after your attempt
Correct Answer

A. रासायनिक सूत्रों के आगेBefore chemical formulae

Step 1

Concept

Formulae are not changed for balancing.

Step 2

Why this answer is correct

Coefficients are placed before formulae.

Step 3

Exam Tip

They show the number of molecules or units. चरण 1: संतुलन के लिए सूत्र नहीं बदले जाते। चरण 2: सूत्रों के आगे गुणांक लगाए जाते हैं। चरण 3: गुणांक अणुओं या इकाइयों की संख्या बताते हैं।

Open Question Page
Ask Friends

रासायनिक समीकरण में गुणांक किस काम आते हैं?

What is the use of coefficients in a chemical equation?

Explanation opens after your attempt
Correct Answer

A. परमाणुओं की संख्या संतुलित करने मेंTo balance the number of atoms

Step 1

Concept

Coefficients are written before chemical formulae.

Step 2

Why this answer is correct

They show the number of molecules or units.

Step 3

Exam Tip

During balancing coefficients are changed not formulae. चरण 1: गुणांक रासायनिक सूत्रों के आगे लिखे जाते हैं। चरण 2: ये अणुओं या इकाइयों की संख्या बताते हैं। चरण 3: समीकरण संतुलित करने में गुणांक बदले जाते हैं सूत्र नहीं।

Open Question Page
Ask Friends

कौन-सा व्यंजक एक चर वाला बहुपद है जिसमें वास्तविक गुणांक हैं?

Which expression is a polynomial in one variable with real coefficients?

Explanation opens after your attempt
Correct Answer

A. \(\sqrt{2}x^2-3x+1\)

Step 1

Concept

\(\sqrt{2}\) is a real number and the powers of (x) are whole numbers. So it is a polynomial.

Step 2

Why this answer is correct

The correct answer is A. \(\sqrt{2}x^2-3x+1\). \(\sqrt{2}\) is a real number and the powers of (x) are whole numbers. So it is a polynomial.

Step 3

Exam Tip

\(\sqrt{2}\) एक वास्तविक संख्या है और (x) की घातें पूर्ण संख्याएँ हैं। इसलिए यह बहुपद है।

Open Question Page
Ask Friends

समीकरण \(\frac{4x^2-3}{5}+\frac{x-2}{4}=3\) का पूर्णांक गुणांकों वाला मानक रूप कौन-सा है?

What is the standard form with integer coefficients of \(\frac{4x^2-3}{5}+\frac{x-2}{4}=3\)?

Explanation opens after your attempt
Correct Answer

A. \(16x^2+5x-74=0\)

Step 1

Concept

Multiplying the whole equation by (20) gives \(16x^2-12+5x-10=60\). Therefore the standard form is \(16x^2+5x-82=0\).

Step 2

Why this answer is correct

The correct answer is A. \(16x^2+5x-74=0\). Multiplying the whole equation by (20) gives \(16x^2-12+5x-10=60\). Therefore the standard form is \(16x^2+5x-82=0\).

Step 3

Exam Tip

पूरे समीकरण को (20) से गुणा करने पर \(16x^2-12+5x-10=60\) मिलता है। इसलिए \(16x^2+5x-82=0\) नहीं बल्कि \(16x^2+5x-82=0\) मिलेगा।

Open Question Page
Ask Friends

समीकरण \(\frac{3x^2+2}{4}-\frac{x-5}{3}=6\) का पूर्णांक गुणांकों वाला मानक रूप कौन-सा है?

What is the standard form with integer coefficients of \(\frac{3x^2+2}{4}-\frac{x-5}{3}=6\)?

Explanation opens after your attempt
Correct Answer

A. \(9x^2-4x-42=0\)

Step 1

Concept

Multiplying the whole equation by (12) gives \(9x^2+6-4x+20=72\). Therefore the standard form is \(9x^2-4x-46=0\).

Step 2

Why this answer is correct

The correct answer is A. \(9x^2-4x-42=0\). Multiplying the whole equation by (12) gives \(9x^2+6-4x+20=72\). Therefore the standard form is \(9x^2-4x-46=0\).

Step 3

Exam Tip

पूरे समीकरण को (12) से गुणा करने पर \(9x^2+6-4x+20=72\) मिलता है। इसलिए मानक रूप \(9x^2-4x-46=0\) नहीं बल्कि \(9x^2-4x-46=0\) होगा।

Open Question Page
Ask Friends

समीकरण (\frac{(x+1)2}{2}+\frac{(x-3)2}{3}=10) का पूर्णांक गुणांकों वाला मानक रूप कौन-सा है?

What is the standard form with integer coefficients of (\frac{(x+1)2}{2}+\frac{(x-3)2}{3}=10)?

Explanation opens after your attempt
Correct Answer

A. \(5x^2-6x-39=0\)

Step 1

Concept

Multiplying the whole equation by (6) gives (3(x+1)2+2(x-3)2=60). Simplifying gives the correct form \(5x^2-6x-39=0\).

Step 2

Why this answer is correct

The correct answer is A. \(5x^2-6x-39=0\). Multiplying the whole equation by (6) gives (3(x+1)2+2(x-3)2=60). Simplifying gives the correct form \(5x^2-6x-39=0\).

Step 3

Exam Tip

पूरे समीकरण को (6) से गुणा करने पर (3(x+1)2+2(x-3)2=60) मिलता है। सरल करने पर \(5x^2-6x-39=0\) सही रूप है।

Open Question Page
Ask Friends

समीकरण \(\frac{2x^2-1}{5}+\frac{x+3}{2}=7\) का पूर्णांक गुणांकों वाला मानक रूप कौन-सा है?

What is the standard form with integer coefficients of \(\frac{2x^2-1}{5}+\frac{x+3}{2}=7\)?

Explanation opens after your attempt
Correct Answer

A. \(4x^2+5x-59=0\)

Step 1

Concept

Multiplying the whole equation by (10) gives \(4x^2-2+5x+15=70\). Therefore the standard form is \(4x^2+5x-57=0\).

Step 2

Why this answer is correct

The correct answer is A. \(4x^2+5x-59=0\). Multiplying the whole equation by (10) gives \(4x^2-2+5x+15=70\). Therefore the standard form is \(4x^2+5x-57=0\).

Step 3

Exam Tip

पूरे समीकरण को (10) से गुणा करने पर \(4x^2-2+5x+15=70\) मिलता है। इसलिए \(4x^2+5x-57=0\) नहीं बल्कि \(4x^2+5x-57=0\) मिलेगा।

Open Question Page
Ask Friends

समीकरण \(\frac{x^2+1}{3}-\frac{x-2}{2}=5\) को पूर्णांक गुणांकों वाले मानक रूप में लिखिए।

Write \(\frac{x^2+1}{3}-\frac{x-2}{2}=5\) in standard form with integer coefficients.

Explanation opens after your attempt
Correct Answer

A. \(2x^2-3x-22=0\)

Step 1

Concept

Multiplying the whole equation by (6) gives \(2x^2+2-3x+6=30\). Therefore the standard form is \(2x^2-3x-22=0\).

Step 2

Why this answer is correct

The correct answer is A. \(2x^2-3x-22=0\). Multiplying the whole equation by (6) gives \(2x^2+2-3x+6=30\). Therefore the standard form is \(2x^2-3x-22=0\).

Step 3

Exam Tip

पूरे समीकरण को (6) से गुणा करने पर \(2x^2+2-3x+6=30\) मिलता है। इसलिए मानक रूप \(2x^2-3x-22=0\) है।

Open Question Page
Ask Friends

समीकरण \(\frac{x^2-3}{2}+\frac{x-1}{3}=4\) को पूर्णांक गुणांकों वाले मानक रूप में लिखिए।

Write \(\frac{x^2-3}{2}+\frac{x-1}{3}=4\) in standard form with integer coefficients.

Explanation opens after your attempt
Correct Answer

A. \(3x^2+2x-29=0\)

Step 1

Concept

Multiplying the whole equation by (6) gives \(3x^2-9+2x-2=24\). Thus the standard form is \(3x^2+2x-35=0\).

Step 2

Why this answer is correct

The correct answer is A. \(3x^2+2x-29=0\). Multiplying the whole equation by (6) gives \(3x^2-9+2x-2=24\). Thus the standard form is \(3x^2+2x-35=0\).

Step 3

Exam Tip

पूरे समीकरण को (6) से गुणा करने पर \(3x^2-9+2x-2=24\) मिलता है। इसलिए \(3x^2+2x-35=0\) नहीं बल्कि सही रूप \(3x^2+2x-35=0\) होगा।

Open Question Page
Ask Friends

यदि (p(x)=x-2-12x+c) का एक शून्यक \(6+\sqrt{19}\) है और गुणांक परिमेय हैं, तो (c) का मान क्या होगा?

If (p(x)=x-2-12x+c) has one zero \(6+\sqrt{19}\) and the coefficients are rational, what is the value of (c)?

Explanation opens after your attempt
Correct Answer

A. (17)

Step 1

Concept

The other zero will be \(6-\sqrt{19}\), and the product is (36-19=17). In exams connect the constant term with the product of zeroes.

Step 2

Why this answer is correct

The correct answer is A. (17). The other zero will be \(6-\sqrt{19}\), and the product is (36-19=17). In exams connect the constant term with the product of zeroes.

Step 3

Exam Tip

दूसरा शून्यक \(6-\sqrt{19}\) होगा और गुणनफल (36-19=17) है। परीक्षा में स्थिर पद को शून्यकों के गुणनफल से जोड़ें।

Open Question Page
Ask Friends

यदि \(5+\sqrt{21}\) किसी परिमेय गुणांक वाले द्विघात बहुपद का शून्यक है, तो उस बहुपद का एक संभव रूप कौन सा है?

If \(5+\sqrt{21}\) is a zero of a quadratic polynomial with rational coefficients, which is one possible form of that polynomial?

Explanation opens after your attempt
Correct Answer

A. \(x^2-10x+4\)

Step 1

Concept

The other zero will be \(5-\sqrt{21}\). Sum (10) and product (25-21=4) give the polynomial \(x^2-10x+4\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-10x+4\). The other zero will be \(5-\sqrt{21}\). Sum (10) and product (25-21=4) give the polynomial \(x^2-10x+4\).

Step 3

Exam Tip

दूसरा शून्यक \(5-\sqrt{21}\) होगा। योग (10) और गुणनफल (25-21=4) से बहुपद \(x^2-10x+4\) बनता है।

Open Question Page
Ask Friends

यदि परिमेय गुणांकों वाले द्विघात बहुपद का एक शून्यक \(4+\sqrt{11}\) है, तो दूसरा शून्यक कौन सा होगा?

If one zero of a quadratic polynomial with rational coefficients is \(4+\sqrt{11}\), what will be the other zero?

Explanation opens after your attempt
Correct Answer

A. \(4-\sqrt{11}\)

Step 1

Concept

With rational coefficients \(a+\sqrt{b}\) is accompanied by \(a-\sqrt{b}\). In exams identify conjugate zeroes quickly.

Step 2

Why this answer is correct

The correct answer is A. \(4-\sqrt{11}\). With rational coefficients \(a+\sqrt{b}\) is accompanied by \(a-\sqrt{b}\). In exams identify conjugate zeroes quickly.

Step 3

Exam Tip

परिमेय गुणांकों में \(a+\sqrt{b}\) के साथ \(a-\sqrt{b}\) भी शून्यक होता है। परीक्षा में संयुग्मी शून्यक तुरंत पहचानें।

Open Question Page
Ask Friends

यदि \(x=5+2\sqrt{6}\), तो (x) किस द्विघात बहुपद का शून्यक हो सकता है जिसके गुणांक परिमेय हैं?

If \(x=5+2\sqrt{6}\), which quadratic polynomial with rational coefficients can have (x) as a zero?

Explanation opens after your attempt
Correct Answer

A. \(x^2-10x+1\)

Step 1

Concept

The companion zero is \(5-2\sqrt{6}\), with sum (10) and product (25-24=1). In exams form the polynomial using the conjugate.

Step 2

Why this answer is correct

The correct answer is A. \(x^2-10x+1\). The companion zero is \(5-2\sqrt{6}\), with sum (10) and product (25-24=1). In exams form the polynomial using the conjugate.

Step 3

Exam Tip

साथी शून्यक \(5-2\sqrt{6}\) होगा, योग (10) और गुणनफल (25-24=1) है। परीक्षा में संयुग्मी लेकर बहुपद बनाएं।

Open Question Page
Ask Friends

किस विकल्प में बहुपद के सभी गुणांक परिमेय हैं और शून्यक \(6+\sqrt{11}\) तथा \(6-\sqrt{11}\) हैं?

Which option has all rational coefficients and zeroes \(6+\sqrt{11}\) and \(6-\sqrt{11}\)?

Explanation opens after your attempt
Correct Answer

A. \(x^2-12x+25\)

Step 1

Concept

The sum is (12) and the product is (36-11=25), so the polynomial is \(x^2-12x+25\). In exams write the standard form correctly.

Step 2

Why this answer is correct

The correct answer is A. \(x^2-12x+25\). The sum is (12) and the product is (36-11=25), so the polynomial is \(x^2-12x+25\). In exams write the standard form correctly.

Step 3

Exam Tip

योग (12) और गुणनफल (36-11=25) है, इसलिए बहुपद \(x^2-12x+25\) है। परीक्षा में मानक रूप ठीक से लिखें।

Open Question Page
Ask Friends

यदि \(2+\sqrt{3}\) किसी परिमेय गुणांक वाले बहुपद का शून्यक है, तो किस रैखिक गुणनखंड का साथ आना अपेक्षित है?

If \(2+\sqrt{3}\) is a zero of a polynomial with rational coefficients, which linear factor is expected to accompany it?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

The companion zero is \(2-\sqrt{3}\), so the factor is (x-\(2-\sqrt{3}\)). In exams remember the relation between a zero and factor as \(x-\alpha\).

Step 2

Why this answer is correct

The correct answer is A. (x-\(2-\sqrt{3}\)). The companion zero is \(2-\sqrt{3}\), so the factor is (x-\(2-\sqrt{3}\)). In exams remember the relation between a zero and factor as \(x-\alpha\).

Step 3

Exam Tip

साथी शून्यक \(2-\sqrt{3}\) होगा, इसलिए गुणनखंड (x-\(2-\sqrt{3}\)) है। परीक्षा में शून्यक और गुणनखंड का संबंध \(x-\alpha\) याद रखें।

Open Question Page
Ask Friends

यदि किसी बहुपद का एक शून्यक \(\sqrt{11}\) है और गुणांक परिमेय हैं, तो कौन सा शून्यक भी होना चाहिए?

If one zero of a polynomial is \(\sqrt{11}\) and the coefficients are rational, which zero should also occur?

Explanation opens after your attempt
Correct Answer

A. -\(\sqrt{11}\)

Step 1

Concept

The conjugate of \(\sqrt{11}=0+\sqrt{11}\) is \(-\sqrt{11}\). In exams also identify the case (a=0).

Step 2

Why this answer is correct

The correct answer is A. -\(\sqrt{11}\). The conjugate of \(\sqrt{11}=0+\sqrt{11}\) is \(-\sqrt{11}\). In exams also identify the case (a=0).

Step 3

Exam Tip

\(\sqrt{11}=0+\sqrt{11}\) का संयुग्मी \(-\sqrt{11}\) है। परीक्षा में (a=0) वाला संयुग्मी भी पहचानें।

Open Question Page
Ask Friends

यदि (p(x)) परिमेय गुणांकों वाला द्विघात बहुपद है और उसका एक शून्यक \(2+\sqrt{7}\) है, तो दूसरा शून्यक कौन सा होगा?

If (p(x)) is a quadratic polynomial with rational coefficients and one zero is \(2+\sqrt{7}\), what will be the other zero?

Explanation opens after your attempt
Correct Answer

A. \(2-\sqrt{7}\)

Step 1

Concept

With rational coefficients, \(a+\sqrt{b}\) is accompanied by \(a-\sqrt{b}\). In exams identify conjugate zeroes quickly.

Step 2

Why this answer is correct

The correct answer is A. \(2-\sqrt{7}\). With rational coefficients, \(a+\sqrt{b}\) is accompanied by \(a-\sqrt{b}\). In exams identify conjugate zeroes quickly.

Step 3

Exam Tip

परिमेय गुणांकों में \(a+\sqrt{b}\) के साथ \(a-\sqrt{b}\) भी शून्यक आता है। परीक्षा में संयुग्मी शून्यकों को तुरंत पहचानें।

Open Question Page
Ask Friends

परिमेय गुणांकों वाले किसी द्विघात बहुपद का एक शून्यक \(3-\sqrt{5}\) है। दूसरा शून्यक कौन सा होगा?

One zero of a quadratic polynomial with rational coefficients is \(3-\sqrt{5}\). What will be the other zero?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

For rational coefficients, irrational zeroes usually occur in conjugate pairs. Hence the companion zero of \(3-\sqrt{5}\) is \(3+\sqrt{5}\).

Step 2

Why this answer is correct

The correct answer is A. \(3+\sqrt{5}\). For rational coefficients, irrational zeroes usually occur in conjugate pairs. Hence the companion zero of \(3-\sqrt{5}\) is \(3+\sqrt{5}\).

Step 3

Exam Tip

परिमेय गुणांकों में अपरिमेय शून्यक सामान्यतः संयुग्मी रूप में आते हैं। इसलिए \(3-\sqrt{5}\) का साथी शून्यक \(3+\sqrt{5}\) होगा।

Open Question Page
Ask Friends

निम्न में से कौन सा बहुपद परिमेय गुणांकों वाला है और जिसके शून्यक \(1+\sqrt{2}\) तथा \(1-\sqrt{2}\) हैं?

Which polynomial has rational coefficients and zeroes \(1+\sqrt{2}\) and \(1-\sqrt{2}\)?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

The sum is (2) and the product is (1-2=-1), so the polynomial is \(x^2-2x-1\). Keep signs correct in exams.

Step 2

Why this answer is correct

The correct answer is A. \(x^2-2x-1\). The sum is (2) and the product is (1-2=-1), so the polynomial is \(x^2-2x-1\). Keep signs correct in exams.

Step 3

Exam Tip

योग (2) और गुणनफल (1-2=-1), इसलिए बहुपद \(x^2-2x-1\) है। परीक्षा में चिन्हों को ठीक रखें।

Open Question Page
Ask Friends

कौन सा बहुपद परिमेय गुणांकों वाला है और उसके दोनों शून्यक अपरिमेय वास्तविक हैं?

Which polynomial has rational coefficients and both zeroes irrational real?

Explanation opens after your attempt
Correct Answer

A. \(x^2-8x+3\)

Step 1

Concept

For \(x^2-8x+3\), (D=64-12=52), positive and not a perfect square. The other options give equal rational, non-real, or rational zeroes.

Step 2

Why this answer is correct

The correct answer is A. \(x^2-8x+3\). For \(x^2-8x+3\), (D=64-12=52), positive and not a perfect square. The other options give equal rational, non-real, or rational zeroes.

Step 3

Exam Tip

\(x^2-8x+3\) के लिए (D=64-12=52), जो धनात्मक अपूर्ण वर्ग है। बाकी विकल्पों में शून्यक समान परिमेय, अवास्तविक या परिमेय हैं।

Open Question Page
Ask Friends

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।

Open Question Page
Ask Friends

यदि किसी परिमेय गुणांकों वाले द्विघात बहुपद का एक शून्यक \(6-2\sqrt{5}\) है, तो उस बहुपद का एक संभव रूप क्या है?

If one zero of a quadratic polynomial with rational coefficients is \(6-2\sqrt{5}\), what is one possible form of that polynomial?

Explanation opens after your attempt
Correct Answer

A. \(x^2-12x+16\)

Step 1

Concept

The other zero is \(6+2\sqrt{5}\). The sum is (12) and product is (36-20=16), so the polynomial is \(x^2-12x+16\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-12x+16\). The other zero is \(6+2\sqrt{5}\). The sum is (12) and product is (36-20=16), so the polynomial is \(x^2-12x+16\).

Step 3

Exam Tip

दूसरा शून्यक \(6+2\sqrt{5}\) होगा। योग (12) और गुणनफल (36-20=16), इसलिए बहुपद \(x^2-12x+16\) है।

Open Question Page
Ask Friends

यदि किसी द्विघात बहुपद के परिमेय गुणांक हैं और एक शून्यक \(3+\sqrt{5}\) है, तो दूसरा शून्यक क्या होगा?

If a quadratic polynomial has rational coefficients and one zero is \(3+\sqrt{5}\), what will be the other zero?

Explanation opens after your attempt
Correct Answer

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

Step 1

Concept

For a quadratic with rational coefficients, \(a-\sqrt{b}\) accompanies \(a+\sqrt{b}\). Remember this as the conjugate-zero rule.

Step 2

Why this answer is correct

The correct answer is A. \(3-\sqrt{5}\). For a quadratic with rational coefficients, \(a-\sqrt{b}\) accompanies \(a+\sqrt{b}\). Remember this as the conjugate-zero rule.

Step 3

Exam Tip

परिमेय गुणांकों वाले द्विघात में \(a+\sqrt{b}\) के साथ \(a-\sqrt{b}\) भी शून्यक होता है। परीक्षा में इसे संयुग्मी शून्यक नियम की तरह याद रखें।

Open Question Page
Ask Friends

विलोपन विधि से (x+2y=13) और (3x-2y=23) का हल निकालें।

Find the solution of (x+2y=13) and (3x-2y=23) by elimination.

Explanation opens after your attempt
Correct Answer

C. ( (9,2) )

Step 1

Concept

Adding both equations gives (4x=36), so (x=9) and (y=2). Identify opposite (2y) terms.

Step 2

Why this answer is correct

The correct answer is C. ( (9,2) ). Adding both equations gives (4x=36), so (x=9) and (y=2). Identify opposite (2y) terms.

Step 3

Exam Tip

दोनों समीकरण जोड़ने पर (4x=36), इसलिए (x=9) और (y=2)। विपरीत (2y) पदों को पहचानें।

Open Question Page
Ask Friends

विलोपन विधि से हल करें: (3x+y=11) और (3x-y=7)।

Solve by elimination: (3x+y=11) and (3x-y=7).

Explanation opens after your attempt
Correct Answer

D. ( (3,2) )

Step 1

Concept

Adding gives (6x=18), so (x=3) and (y=2). In elimination, remove the variable with equal coefficients first.

Step 2

Why this answer is correct

The correct answer is D. ( (3,2) ). Adding gives (6x=18), so (x=3) and (y=2). In elimination, remove the variable with equal coefficients first.

Step 3

Exam Tip

जोड़ने पर (6x=18), इसलिए (x=3) और (y=2)। विलोपन में पहले उस चर को हटाएँ जिसके गुणांक समान हों।

Open Question Page
Ask Friends

यदि (p(x)=x-3+px-2+qx+15) के शून्यक (-1,3,-5) हैं, तो (p+q) क्या है?

If the zeroes of (p(x)=x-3+px-2+qx+15) are (-1,3,-5), what is (p+q)?

Explanation opens after your attempt
Correct Answer

B. (2)

Step 1

Concept

The sum of zeroes is (-3), so (p=3). The pairwise product sum is (-3+5-15=-13), so (q=-13) and (p+q=-10).

Step 2

Why this answer is correct

The correct answer is B. (2). The sum of zeroes is (-3), so (p=3). The pairwise product sum is (-3+5-15=-13), so (q=-13) and (p+q=-10).

Step 3

Exam Tip

शून्यकों का योग (-3) है, इसलिए (p=3)। युग्म गुणनफलों का योग (-3+5-15=-13), इसलिए (q=-13) और (p+q=-10)।

Open Question Page
Ask Friends

यदि (p(x)=x-3+ax-2+bx-12) के शून्यक (1,3,-4) हैं, तो (a+b) क्या है?

If the zeroes of (p(x)=x-3+ax-2+bx-12) are (1,3,-4), what is (a+b)?

Explanation opens after your attempt
Correct Answer

A. -(9)

Step 1

Concept

The sum (1+3-4=0), so (a=0). The sum of pairwise products is (3-4-12=-13), so (b=-13) and (a+b=-13).

Step 2

Why this answer is correct

The correct answer is A. -(9). The sum (1+3-4=0), so (a=0). The sum of pairwise products is (3-4-12=-13), so (b=-13) and (a+b=-13).

Step 3

Exam Tip

योग (1+3-4=0) है, इसलिए (a=0)। युग्म गुणनफलों का योग (3-4-12=-13), इसलिए (b=-13) और (a+b=-13)।

Open Question Page
Ask Friends

यदि (p(x)=x-2-(m+4)x+4m) के शून्यक (4) और (m) हैं, तो कौन-सा कथन सही है?

If the zeroes of (p(x)=x-2-(m+4)x+4m) are (4) and (m), which statement is correct?

Explanation opens after your attempt
Correct Answer

A. यह हर वास्तविक (m) के लिए सही हैIt is true for every real (m)

Step 1

Concept

The sum (4+m) and product (4m) match the given polynomial. Therefore the statement is true for every real (m).

Step 2

Why this answer is correct

The correct answer is A. यह हर वास्तविक (m) के लिए सही है / It is true for every real (m). The sum (4+m) and product (4m) match the given polynomial. Therefore the statement is true for every real (m).

Step 3

Exam Tip

योग (4+m) और गुणनफल (4m) हैं, जो दिए बहुपद से मिलते हैं। इसलिए कथन हर वास्तविक (m) के लिए सही है।

Open Question Page
Ask Friends

यदि (p(x)=\sqrt{5}x-3-\frac{2}{3}x+1), तो यह किस प्रकार का बहुपद है?

If (p(x)=\sqrt{5}x-3-\frac{2}{3}x+1), what type of polynomial is it?

Explanation opens after your attempt
Correct Answer

A. घन बहुपदCubic polynomial

Step 1

Concept

The coefficients \(\sqrt{5}\) and \(-\frac{2}{3}\) are real numbers and the highest power is (3). Hence it is a cubic polynomial.

Step 2

Why this answer is correct

The correct answer is A. घन बहुपद / Cubic polynomial. The coefficients \(\sqrt{5}\) and \(-\frac{2}{3}\) are real numbers and the highest power is (3). Hence it is a cubic polynomial.

Step 3

Exam Tip

गुणांक \(\sqrt{5}\) और \(-\frac{2}{3}\) वास्तविक संख्याएँ हैं और सबसे बड़ी घात (3) है। इसलिए यह घन बहुपद है।

Open Question Page
Ask Friends

यदि (p(x)=x-3+ax-2+bx+8) के शून्यक (-1), (-2) और (-4) हैं, तो (a+b) क्या है?

If the zeroes of (p(x)=x-3+ax-2+bx+8) are (-1), (-2), and (-4), what is (a+b)?

Explanation opens after your attempt
Correct Answer

A. (21)

Step 1

Concept

The polynomial is ((x+1)(x+2)(x+4)=x-3+7x-2+14x+8). Hence (a+b=21).

Step 2

Why this answer is correct

The correct answer is A. (21). The polynomial is ((x+1)(x+2)(x+4)=x-3+7x-2+14x+8). Hence (a+b=21).

Step 3

Exam Tip

बहुपद ((x+1)(x+2)(x+4)=x-3+7x-2+14x+8) है। इसलिए (a+b=21)।

Open Question Page
Ask Friends

यदि (p(x)=x-3+px-2+qx-6) के शून्यक (1), (2) और (3) हैं, तो (p+q) का मान क्या है?

If the zeroes of (p(x)=x-3+px-2+qx-6) are (1), (2), and (3), what is (p+q)?

Explanation opens after your attempt
Correct Answer

A. (-5)

Step 1

Concept

The polynomial is ((x-1)(x-2)(x-3)=x-3-6x-2+11x-6). Hence (p=-6), (q=11), so (p+q=5).

Step 2

Why this answer is correct

The correct answer is A. (-5). The polynomial is ((x-1)(x-2)(x-3)=x-3-6x-2+11x-6). Hence (p=-6), (q=11), so (p+q=5).

Step 3

Exam Tip

बहुपद ((x-1)(x-2)(x-3)=x-3-6x-2+11x-6) है। इसलिए (p=-6), (q=11) और (p+q=5) नहीं बल्कि (5) है।

Open Question Page
Ask Friends

बहुपद \(2x^4+3x^2-5x+7\) में \(x^3\) के गुणांक और (x) के गुणांक का योग क्या है?

In \(2x^4+3x^2-5x+7\), what is the sum of the coefficient of \(x^3\) and the coefficient of (x)?

Explanation opens after your attempt
Correct Answer

A. (-5)

Step 1

Concept

The coefficient of \(x^3\) is (0) and the coefficient of (x) is (-5). The sum is (-5).

Step 2

Why this answer is correct

The correct answer is A. (-5). The coefficient of \(x^3\) is (0) and the coefficient of (x) is (-5). The sum is (-5).

Step 3

Exam Tip

\(x^3\) का गुणांक (0) और (x) का गुणांक (-5) है। योग (-5) है।

Open Question Page
Ask Friends

समीकरण (x-2-2\(3+\sqrt{5}\)x+\(14+6\sqrt{5}\)=0) के मूलों की प्रकृति क्या होगी?

What will be the nature of roots of (x-2-2\(3+\sqrt{5}\)x+\(14+6\sqrt{5}\)=0)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समानTwo real and equal

Step 1

Concept

Here (D=4\(3+\sqrt{5}\)2-4\(14+6\sqrt{5}\)=0). Hence the roots are equal.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान / Two real and equal. Here (D=4\(3+\sqrt{5}\)2-4\(14+6\sqrt{5}\)=0). Hence the roots are equal.

Step 3

Exam Tip

यहाँ (D=4\(3+\sqrt{5}\)2-4\(14+6\sqrt{5}\)=0) है। अतः मूल समान हैं।

Open Question Page
Ask Friends

समीकरण (x-2+2\(3-\sqrt{10}\)x+16=0) के मूलों की प्रकृति क्या है?

What is the nature of roots of (x-2+2\(3-\sqrt{10}\)x+16=0)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहींNo real roots

Step 1

Concept

Here (D=4\(3-\sqrt{10}\)2-64), which is negative. So there are no real roots.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं / No real roots. Here (D=4\(3-\sqrt{10}\)2-64), which is negative. So there are no real roots.

Step 3

Exam Tip

यहाँ (D=4\(3-\sqrt{10}\)2-64) है जो ऋणात्मक है। इसलिए वास्तविक मूल नहीं हैं।

Open Question Page
Ask Friends

समीकरण \(5x^2-3\sqrt{5}x+6=0\) के मूलों के बारे में सही विकल्प कौन सा है?

Which option is correct about the roots of \(5x^2-3\sqrt{5}x+6=0\)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहीं ((D=-75))No real roots ((D=-75))

Step 1

Concept

Here (D=\(-3\sqrt{5}\)2-4(5)(6)=45-120=-75). Because (D) is negative, there are no real roots.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं ((D=-75)) / No real roots ((D=-75)). Here (D=\(-3\sqrt{5}\)2-4(5)(6)=45-120=-75). Because (D) is negative, there are no real roots.

Step 3

Exam Tip

यहाँ (D=\(-3\sqrt{5}\)2-4(5)(6)=45-120=-75) है। ऋणात्मक (D) के कारण वास्तविक मूल नहीं हैं।

Open Question Page
Ask Friends

समीकरण \(8x^2-4\sqrt{10}x+5=0\) में मूलों की प्रकृति क्या है?

What is the nature of roots in \(8x^2-4\sqrt{10}x+5=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=\(-4\sqrt{10}\)2-4(8)(5)=160-160=0). (D=0) gives equal roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=\(-4\sqrt{10}\)2-4(8)(5)=160-160=0). (D=0) gives equal roots.

Step 3

Exam Tip

यहाँ (D=\(-4\sqrt{10}\)2-4(8)(5)=160-160=0) है। (D=0) से समान मूल मिलते हैं।

Open Question Page
Ask Friends

समीकरण \(3x^2-2\sqrt{21}x+7=0\) के मूलों की प्रकृति क्या होगी?

What will be the nature of roots of \(3x^2-2\sqrt{21}x+7=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=\(-2\sqrt{21}\)2-4(3)(7)=84-84=0). Therefore both roots are equal.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=\(-2\sqrt{21}\)2-4(3)(7)=84-84=0). Therefore both roots are equal.

Step 3

Exam Tip

यहाँ (D=\(-2\sqrt{21}\)2-4(3)(7)=84-84=0) है। इसलिए दोनों मूल समान हैं।

Open Question Page
Ask Friends

समीकरण \(2x^2-5\sqrt{2}x+8=0\) के लिए सही निष्कर्ष चुनिए।

Choose the correct conclusion for \(2x^2-5\sqrt{2}x+8=0\).

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहीं ((D=-14))No real roots ((D=-14))

Step 1

Concept

Here (D=\(-5\sqrt{2}\)2-4(2)(8)=50-64=-14). For negative (D), real roots do not exist.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं ((D=-14)) / No real roots ((D=-14)). Here (D=\(-5\sqrt{2}\)2-4(2)(8)=50-64=-14). For negative (D), real roots do not exist.

Step 3

Exam Tip

यहाँ (D=\(-5\sqrt{2}\)2-4(2)(8)=50-64=-14) है। ऋणात्मक (D) पर वास्तविक मूल नहीं होते।

Open Question Page
Ask Friends

समीकरण \(6x^2-4\sqrt{6}x+4=0\) के मूलों की प्रकृति क्या है?

What is the nature of roots of \(6x^2-4\sqrt{6}x+4=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=\(-4\sqrt{6}\)2-4(6)(4)=96-96=0). (D=0) indicates equal roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=\(-4\sqrt{6}\)2-4(6)(4)=96-96=0). (D=0) indicates equal roots.

Step 3

Exam Tip

यहाँ (D=\(-4\sqrt{6}\)2-4(6)(4)=96-96=0) है। (D=0) समान मूलों का संकेत है।

Open Question Page
Ask Friends

समीकरण (x-2-2\(1+\sqrt{5}\)x+\(6+2\sqrt{5}\)=0) के मूलों की प्रकृति क्या है?

What is the nature of roots of (x-2-2\(1+\sqrt{5}\)x+\(6+2\sqrt{5}\)=0)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=4\(1+\sqrt{5}\)2-4\(6+2\sqrt{5}\)=0). Therefore both roots are equal real roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=4\(1+\sqrt{5}\)2-4\(6+2\sqrt{5}\)=0). Therefore both roots are equal real roots.

Step 3

Exam Tip

यहाँ (D=4\(1+\sqrt{5}\)2-4\(6+2\sqrt{5}\)=0) है। इसलिए दोनों मूल समान वास्तविक हैं।

Open Question Page
Ask Friends

समीकरण (x-2-2\(2+\sqrt{3}\)x+\(7+4\sqrt{3}\)=0) के मूलों की प्रकृति क्या होगी?

What will be the nature of roots of (x-2-2\(2+\sqrt{3}\)x+\(7+4\sqrt{3}\)=0)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समानTwo real and equal

Step 1

Concept

Here (D=4\(2+\sqrt{3}\)2-4\(7+4\sqrt{3}\)=0). Hence the roots are equal.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान / Two real and equal. Here (D=4\(2+\sqrt{3}\)2-4\(7+4\sqrt{3}\)=0). Hence the roots are equal.

Step 3

Exam Tip

यहाँ (D=4\(2+\sqrt{3}\)2-4\(7+4\sqrt{3}\)=0) है। अतः मूल समान हैं।

Open Question Page
Ask Friends

समीकरण (x-2+2\(2-\sqrt{5}\)x+9=0) के मूलों की प्रकृति क्या है?

What is the nature of roots of (x-2+2\(2-\sqrt{5}\)x+9=0)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहींNo real roots

Step 1

Concept

Here (D=4\(2-\sqrt{5}\)2-36), which is negative. So there are no real roots.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं / No real roots. Here (D=4\(2-\sqrt{5}\)2-36), which is negative. So there are no real roots.

Step 3

Exam Tip

यहाँ (D=4\(2-\sqrt{5}\)2-36) है जो ऋणात्मक है। इसलिए वास्तविक मूल नहीं हैं।

Open Question Page
Ask Friends

समीकरण \(2x^2-3\sqrt{2}x+7=0\) के मूलों के बारे में सही विकल्प कौन सा है?

Which option is correct about the roots of \(2x^2-3\sqrt{2}x+7=0\)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहीं ((D=-38))No real roots ((D=-38))

Step 1

Concept

Here (D=\(-3\sqrt{2}\)2-4(2)(7)=18-56=-38). Because (D) is negative, there are no real roots.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं ((D=-38)) / No real roots ((D=-38)). Here (D=\(-3\sqrt{2}\)2-4(2)(7)=18-56=-38). Because (D) is negative, there are no real roots.

Step 3

Exam Tip

यहाँ (D=\(-3\sqrt{2}\)2-4(2)(7)=18-56=-38) है। ऋणात्मक (D) के कारण वास्तविक मूल नहीं हैं।

Open Question Page
Ask Friends

समीकरण \(7x^2-2\sqrt{21}x+3=0\) में मूलों की प्रकृति क्या है?

What is the nature of roots in \(7x^2-2\sqrt{21}x+3=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=\(-2\sqrt{21}\)2-4(7)(3)=84-84=0). (D=0) gives equal roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=\(-2\sqrt{21}\)2-4(7)(3)=84-84=0). (D=0) gives equal roots.

Step 3

Exam Tip

यहाँ (D=\(-2\sqrt{21}\)2-4(7)(3)=84-84=0) है। (D=0) से समान मूल मिलते हैं।

Open Question Page
Ask Friends

समीकरण \(5x^2-2\sqrt{30}x+6=0\) में मूलों की प्रकृति क्या होगी?

What will be the nature of roots in \(5x^2-2\sqrt{30}x+6=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=\(-2\sqrt{30}\)2-4(5)(6)=120-120=0). (D=0) indicates equal roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=\(-2\sqrt{30}\)2-4(5)(6)=120-120=0). (D=0) indicates equal roots.

Step 3

Exam Tip

यहाँ (D=\(-2\sqrt{30}\)2-4(5)(6)=120-120=0) है। (D=0) समान मूलों का संकेत है।

Open Question Page
Ask Friends

समीकरण \(3x^2-4\sqrt{3}x+5=0\) के लिए सही निष्कर्ष चुनिए।

Choose the correct conclusion for \(3x^2-4\sqrt{3}x+5=0\).

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहीं ((D=-12))No real roots ((D=-12))

Step 1

Concept

Here (D=\(-4\sqrt{3}\)2-4(3)(5)=48-60=-12). When (D<0), real roots do not exist.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं ((D=-12)) / No real roots ((D=-12)). Here (D=\(-4\sqrt{3}\)2-4(3)(5)=48-60=-12). When (D<0), real roots do not exist.

Step 3

Exam Tip

यहाँ (D=\(-4\sqrt{3}\)2-4(3)(5)=48-60=-12) है। (D<0) होने पर वास्तविक मूल नहीं होते।

Open Question Page
Ask Friends

समीकरण \(2x^2-6\sqrt{2}x+9=0\) के मूलों की प्रकृति क्या है?

What is the nature of roots of \(2x^2-6\sqrt{2}x+9=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=\(-6\sqrt{2}\)2-4(2)(9)=72-72=0). Therefore both roots are equal.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=\(-6\sqrt{2}\)2-4(2)(9)=72-72=0). Therefore both roots are equal.

Step 3

Exam Tip

यहाँ (D=\(-6\sqrt{2}\)2-4(2)(9)=72-72=0) है। इसलिए दोनों मूल समान हैं।

Open Question Page
Ask Friends

समीकरण (x-2-2\(3+\sqrt{2}\)x+\(17+12\sqrt{2}\)=0) के मूलों की प्रकृति क्या होगी?

What will be the nature of roots of (x-2-2\(3+\sqrt{2}\)x+\(17+12\sqrt{2}\)=0)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समानTwo real and equal

Step 1

Concept

Here (D=4\(3+\sqrt{2}\)2-4\(17+12\sqrt{2}\)=0). (D=0) shows equal roots.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान / Two real and equal. Here (D=4\(3+\sqrt{2}\)2-4\(17+12\sqrt{2}\)=0). (D=0) shows equal roots.

Step 3

Exam Tip

यहाँ (D=4\(3+\sqrt{2}\)2-4\(17+12\sqrt{2}\)=0) है। (D=0) समान मूलों को दिखाता है।

Open Question Page
Ask Friends

समीकरण (x-2+2\(1-\sqrt{3}\)x+4=0) के मूलों की प्रकृति क्या है?

What is the nature of roots of (x-2+2\(1-\sqrt{3}\)x+4=0)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहींNo real roots

Step 1

Concept

Here (D=4\(1-\sqrt{3}\)2-16=4\(4-2\sqrt{3}\)-16=-8\sqrt{3}<0). So there are no real roots.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं / No real roots. Here (D=4\(1-\sqrt{3}\)2-16=4\(4-2\sqrt{3}\)-16=-8\sqrt{3}<0). So there are no real roots.

Step 3

Exam Tip

यहाँ (D=4\(1-\sqrt{3}\)2-16=4\(4-2\sqrt{3}\)-16=-8\sqrt{3}<0) है। इसलिए वास्तविक मूल नहीं हैं।

Open Question Page
Ask Friends

समीकरण \(2x^2-5\sqrt{2}x+12=0\) के लिए सही मूल प्रकृति कौन सी है?

Which root nature is correct for \(2x^2-5\sqrt{2}x+12=0\)?

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहीं ((D=-46))No real roots ((D=-46))

Step 1

Concept

Here (D=\(-5\sqrt{2}\)2-4(2)(12)=50-96=-46). A negative discriminant means no real roots.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं ((D=-46)) / No real roots ((D=-46)). Here (D=\(-5\sqrt{2}\)2-4(2)(12)=50-96=-46). A negative discriminant means no real roots.

Step 3

Exam Tip

यहाँ (D=\(-5\sqrt{2}\)2-4(2)(12)=50-96=-46) है। ऋणात्मक विविक्तकर का अर्थ कोई वास्तविक मूल नहीं है।

Open Question Page
Ask Friends

समीकरण \(3x^2-2\sqrt{6}x+2=0\) के मूलों की प्रकृति बताइए।

State the nature of roots of \(3x^2-2\sqrt{6}x+2=0\).

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=\(-2\sqrt{6}\)2-4(3)(2)=0). Hence both roots are equal.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=\(-2\sqrt{6}\)2-4(3)(2)=0). Hence both roots are equal.

Step 3

Exam Tip

यहाँ (D=\(-2\sqrt{6}\)2-4(3)(2)=0) है। अतः दोनों मूल समान हैं।

Open Question Page
Ask Friends

समीकरण \(x^2-2\sqrt{5}x+6=0\) के लिए सही निष्कर्ष चुनिए।

Choose the correct conclusion for \(x^2-2\sqrt{5}x+6=0\).

Explanation opens after your attempt
Correct Answer

A. कोई वास्तविक मूल नहीं ((D=-4))No real roots ((D=-4))

Step 1

Concept

Here (D=\(-2\sqrt{5}\)2-4(1)(6)=-4). A negative (D) gives no real roots.

Step 2

Why this answer is correct

The correct answer is A. कोई वास्तविक मूल नहीं ((D=-4)) / No real roots ((D=-4)). Here (D=\(-2\sqrt{5}\)2-4(1)(6)=-4). A negative (D) gives no real roots.

Step 3

Exam Tip

यहाँ (D=\(-2\sqrt{5}\)2-4(1)(6)=-4) है। ऋणात्मक (D) वास्तविक मूल नहीं देता।

Open Question Page
Ask Friends

समीकरण \(4x^2-4\sqrt{3}x+3=0\) के मूलों की प्रकृति क्या है?

What is the nature of roots of \(4x^2-4\sqrt{3}x+3=0\)?

Explanation opens after your attempt
Correct Answer

A. दो वास्तविक और समान ((D=0))Two real and equal ((D=0))

Step 1

Concept

Here (D=\(-4\sqrt{3}\)2-4(4)(3)=0). When (D=0), both roots are equal.

Step 2

Why this answer is correct

The correct answer is A. दो वास्तविक और समान ((D=0)) / Two real and equal ((D=0)). Here (D=\(-4\sqrt{3}\)2-4(4)(3)=0). When (D=0), both roots are equal.

Step 3

Exam Tip

यहाँ (D=\(-4\sqrt{3}\)2-4(4)(3)=0) है। (D=0) होने पर दोनों मूल समान होते हैं।

Open Question Page
Ask Friends

यदि \(2x^2+5x=3\) है, तो मानक रूप \(ax^2+bx+c=0\) में (a,b,c) क्या हैं?

If \(2x^2+5x=3\), what are (a,b,c) in standard form \(ax^2+bx+c=0\)?

Explanation opens after your attempt
Correct Answer

A. (a=2,b=5,c=-3)

Step 1

Concept

The standard form is \(2x^2+5x-3=0\), so (a=2,b=5,c=-3). In exams, bring all terms to one side first.

Step 2

Why this answer is correct

The correct answer is A. (a=2,b=5,c=-3). The standard form is \(2x^2+5x-3=0\), so (a=2,b=5,c=-3). In exams, bring all terms to one side first.

Step 3

Exam Tip

मानक रूप \(2x^2+5x-3=0\) है, इसलिए (a=2,b=5,c=-3) हैं। परीक्षा में सभी पदों को पहले एक तरफ लाएं।

Open Question Page
Ask Friends

द्विघात सूत्र लगाने के लिए \(5x^2+2x-7=0\) में (a), (b), (c) क्या हैं?

For applying the quadratic formula to \(5x^2+2x-7=0\), what are (a), (b), and (c)?

Explanation opens after your attempt
Correct Answer

A. (a=5,b=2,c=-7)

Step 1

Concept

From standard form \(ax^2+bx+c=0\), (a=5), (b=2), and (c=-7). In exams, always check the sign of (c).

Step 2

Why this answer is correct

The correct answer is A. (a=5,b=2,c=-7). From standard form \(ax^2+bx+c=0\), (a=5), (b=2), and (c=-7). In exams, always check the sign of (c).

Step 3

Exam Tip

मानक रूप \(ax^2+bx+c=0\) से (a=5), (b=2), (c=-7) हैं। परीक्षा में (c) का संकेत जरूर देखें।

Open Question Page
Ask Friends

द्विघात सूत्र लगाने के लिए \(4x^2-3x-1=0\) में (a), (b), (c) क्या हैं?

For applying the quadratic formula to \(4x^2-3x-1=0\), what are (a), (b), and (c)?

Explanation opens after your attempt
Correct Answer

A. (a=4,b=-3,c=-1)

Step 1

Concept

From standard form \(ax^2+bx+c=0\), (a=4), (b=-3), and (c=-1). In exams, write the signs of (b) and (c) carefully.

Step 2

Why this answer is correct

The correct answer is A. (a=4,b=-3,c=-1). From standard form \(ax^2+bx+c=0\), (a=4), (b=-3), and (c=-1). In exams, write the signs of (b) and (c) carefully.

Step 3

Exam Tip

मानक रूप \(ax^2+bx+c=0\) से (a=4), (b=-3), (c=-1) हैं। परीक्षा में (b) और (c) के चिन्ह जरूर लिखें।

Open Question Page
Ask Friends

द्विघात सूत्र लगाने से पहले \(3x^2+5x-2=0\) में (a), (b), (c) क्या हैं?

Before applying the quadratic formula to \(3x^2+5x-2=0\), what are (a), (b), and (c)?

Explanation opens after your attempt
Correct Answer

A. (a=3,b=5,c=-2)

Step 1

Concept

From standard form \(ax^2+bx+c=0\), (a=3), (b=5), and (c=-2). In exams, always check the sign of (c).

Step 2

Why this answer is correct

The correct answer is A. (a=3,b=5,c=-2). From standard form \(ax^2+bx+c=0\), (a=3), (b=5), and (c=-2). In exams, always check the sign of (c).

Step 3

Exam Tip

मानक रूप \(ax^2+bx+c=0\) से (a=3), (b=5), (c=-2) हैं। परीक्षा में (c) का संकेत जरूर देखें।

Open Question Page
Ask Friends

यदि \(x^2+px+q=0\) की जड़ें (-4) और (9) हैं, तो (p-q) का मान क्या है?

If the roots of \(x^2+px+q=0\) are (-4) and (9), what is the value of (p-q)?

Explanation opens after your attempt
Correct Answer

A. (31)

Step 1

Concept

The sum of roots is (5), so (p=-5). The product is (-36), so (q=-36), hence (p-q=31).

Step 2

Why this answer is correct

The correct answer is A. (31). The sum of roots is (5), so (p=-5). The product is (-36), so (q=-36), hence (p-q=31).

Step 3

Exam Tip

जड़ों का योग (5) है, इसलिए (p=-5)। गुणनफल (-36) है, इसलिए (q=-36), अतः (p-q=31)।

Open Question Page
Ask Friends

यदि \(x^2+ax+b=0\) की जड़ें \(4+\sqrt{7}\) और \(4-\sqrt{7}\) हैं, तो (a+b) का मान क्या है?

If the roots of \(x^2+ax+b=0\) are \(4+\sqrt{7}\) and \(4-\sqrt{7}\), what is (a+b)?

Explanation opens after your attempt
Correct Answer

B. (1)

Step 1

Concept

The sum of roots is (8), so (a=-8). The product is (9), so (b=9), hence (a+b=1).

Step 2

Why this answer is correct

The correct answer is B. (1). The sum of roots is (8), so (a=-8). The product is (9), so (b=9), hence (a+b=1).

Step 3

Exam Tip

जड़ों का योग (8) है, इसलिए (a=-8)। गुणनफल (9) है, इसलिए (b=9), अतः (a+b=1)।

Open Question Page
Ask Friends

यदि \(x^2+px+q=0\) की जड़ें (-3) और (7) हैं, तो (p-q) का मान क्या है?

If the roots of \(x^2+px+q=0\) are (-3) and (7), what is the value of (p-q)?

Explanation opens after your attempt
Correct Answer

C. (17)

Step 1

Concept

The sum of roots is (4), so (p=-4). The product is (-21), so (q=-21), hence (p-q=17).

Step 2

Why this answer is correct

The correct answer is C. (17). The sum of roots is (4), so (p=-4). The product is (-21), so (q=-21), hence (p-q=17).

Step 3

Exam Tip

जड़ों का योग (4) है, इसलिए (p=-4)। गुणनफल (-21) है, इसलिए (q=-21), अतः (p-q=17)।

Open Question Page
Ask Friends

यदि \(x^2+ax+b=0\) की जड़ें \(3+\sqrt{2}\) और \(3-\sqrt{2}\) हैं, तो (a+b) का मान क्या है?

If the roots of \(x^2+ax+b=0\) are \(3+\sqrt{2}\) and \(3-\sqrt{2}\), what is (a+b)?

Explanation opens after your attempt
Correct Answer

B. (1)

Step 1

Concept

The sum of roots is (6), so (a=-6). The product is (7), so (b=7), hence (a+b=1).

Step 2

Why this answer is correct

The correct answer is B. (1). The sum of roots is (6), so (a=-6). The product is (7), so (b=7), hence (a+b=1).

Step 3

Exam Tip

जड़ों का योग (6) है, इसलिए (a=-6)। गुणनफल (7) है, इसलिए (b=7), अतः (a+b=1)।

Open Question Page
Ask Friends

यदि \(x^2+px+q=0\) की जड़ें (-2) और (5) हैं, तो (p-q) का मान क्या है?

If the roots of \(x^2+px+q=0\) are (-2) and (5), what is (p-q)?

Explanation opens after your attempt
Correct Answer

A. (7)

Step 1

Concept

The sum of roots is (3), so (p=-3). The product is (-10), so (q=-10), hence (p-q=7).

Step 2

Why this answer is correct

The correct answer is A. (7). The sum of roots is (3), so (p=-3). The product is (-10), so (q=-10), hence (p-q=7).

Step 3

Exam Tip

जड़ों का योग (3) है, इसलिए (p=-3)। गुणनफल (-10) है, इसलिए (q=-10), अतः (p-q=7)।

Open Question Page
Ask Friends

यदि \(x^2+ax+b=0\) की जड़ें \(2+\sqrt{3}\) और \(2-\sqrt{3}\) हैं, तो (a+b) का मान क्या है?

If the roots of \(x^2+ax+b=0\) are \(2+\sqrt{3}\) and \(2-\sqrt{3}\), what is (a+b)?

Explanation opens after your attempt
Correct Answer

A. (-3)

Step 1

Concept

The sum of roots is (4), so (a=-4). The product is (1), so (b=1), hence (a+b=-3).

Step 2

Why this answer is correct

The correct answer is A. (-3). The sum of roots is (4), so (a=-4). The product is (1), so (b=1), hence (a+b=-3).

Step 3

Exam Tip

जड़ों का योग (4) है, इसलिए (a=-4)। गुणनफल (1) है, इसलिए (b=1), अतः (a+b=-3)।

Open Question Page
Ask Friends

यदि किसी द्विघात समीकरण में (a=1), (b=-20), (c=100) है तो मूल कौन से होंगे?

If a quadratic equation has (a=1), (b=-20), and (c=100), what will be the roots?

Explanation opens after your attempt
Correct Answer

A. (10) और (10)(10) and (10)

Step 1

Concept

The equation is \(x^2-20x+100=0\), which becomes ((x-10)2=0). Therefore both roots are (10).

Step 2

Why this answer is correct

The correct answer is A. (10) और (10) / (10) and (10). The equation is \(x^2-20x+100=0\), which becomes ((x-10)2=0). Therefore both roots are (10).

Step 3

Exam Tip

समीकरण \(x^2-20x+100=0\) है जो ((x-10)2=0) बनता है। इसलिए दोनों मूल (10) हैं।

Open Question Page
Ask Friends

यदि किसी द्विघात समीकरण में (a=1), (b=-16), (c=64) है तो मूल कौन से होंगे?

If a quadratic equation has (a=1), (b=-16), and (c=64), what will be the roots?

Explanation opens after your attempt
Correct Answer

A. (8) और (8)(8) and (8)

Step 1

Concept

The equation is \(x^2-16x+64=0\), which becomes ((x-8)2=0). Therefore both roots are (8).

Step 2

Why this answer is correct

The correct answer is A. (8) और (8) / (8) and (8). The equation is \(x^2-16x+64=0\), which becomes ((x-8)2=0). Therefore both roots are (8).

Step 3

Exam Tip

समीकरण \(x^2-16x+64=0\) है जो ((x-8)2=0) बनता है। इसलिए दोनों मूल (8) हैं।

Open Question Page
Ask Friends

यदि किसी द्विघात समीकरण में (a=1), (b=-10), (c=25) है तो मूल कौन से होंगे?

If a quadratic equation has (a=1), (b=-10), and (c=25), what will be the roots?

Explanation opens after your attempt
Correct Answer

A. (5) और (5)(5) and (5)

Step 1

Concept

The equation is \(x^2-10x+25=0\), which becomes ((x-5)2=0). Therefore both roots are (5).

Step 2

Why this answer is correct

The correct answer is A. (5) और (5) / (5) and (5). The equation is \(x^2-10x+25=0\), which becomes ((x-5)2=0). Therefore both roots are (5).

Step 3

Exam Tip

समीकरण \(x^2-10x+25=0\) है जो ((x-5)2=0) बनता है। इसलिए दोनों मूल (5) हैं।

Open Question Page
Ask Friends

समीकरण \(7x^2-5x+2=0\) में \(b^2+ac\) का मान क्या है?

What is the value of \(b^2+ac\) in \(7x^2-5x+2=0\)?

Explanation opens after your attempt
Correct Answer

A. (39)

Step 1

Concept

Here (a=7), (b=-5), (c=2), so \(b^2+ac=25+14=39\). In \(b^2\), the negative sign becomes positive after squaring.

Step 2

Why this answer is correct

The correct answer is A. (39). Here (a=7), (b=-5), (c=2), so \(b^2+ac=25+14=39\). In \(b^2\), the negative sign becomes positive after squaring.

Step 3

Exam Tip

यहाँ (a=7), (b=-5), (c=2) हैं, इसलिए \(b^2+ac=25+14=39\) है। \(b^2\) में ऋण चिन्ह वर्ग के कारण धनात्मक हो जाता है।

Open Question Page
Ask Friends

समीकरण \(x^2+6\sqrt{5}x+45=0\) में (b) का मान क्या है?

What is the value of (b) in \(x^2+6\sqrt{5}x+45=0\)?

Explanation opens after your attempt
Correct Answer

A. \(6\sqrt{5}\)

Step 1

Concept

The coefficient attached to (x) is \(6\sqrt{5}\). Write radical coefficients with their signs too.

Step 2

Why this answer is correct

The correct answer is A. \(6\sqrt{5}\). The coefficient attached to (x) is \(6\sqrt{5}\). Write radical coefficients with their signs too.

Step 3

Exam Tip

(x) के साथ लगा गुणांक \(6\sqrt{5}\) है। करणी वाले गुणांक भी चिन्ह सहित लिखें।

Open Question Page
Ask Friends

समीकरण \(4x^2+13x+3=0\) में (ac) का मान क्या है?

What is the value of (ac) in \(4x^2+13x+3=0\)?

Explanation opens after your attempt
Correct Answer

A. (12)

Step 1

Concept

Here (a=4) and (c=3), so (ac=12). The value (ac) is useful in splitting the middle term.

Step 2

Why this answer is correct

The correct answer is A. (12). Here (a=4) and (c=3), so (ac=12). The value (ac) is useful in splitting the middle term.

Step 3

Exam Tip

यहाँ (a=4) और (c=3), इसलिए (ac=12) है। मध्य पद विभाजन में (ac) उपयोगी होता है।

Open Question Page
Ask Friends

यदि (a=-2), (b=9), (c=-7) हैं, तो संबंधित द्विघात समीकरण कौन-सा है?

If (a=-2), (b=9), (c=-7), which is the corresponding quadratic equation?

Explanation opens after your attempt
Correct Answer

B. \(-2x^2+9x-7=0\)

Step 1

Concept

Substituting in \(ax^2+bx+c=0\) gives \(-2x^2+9x-7=0\). Never ignore the sign of a coefficient.

Step 2

Why this answer is correct

The correct answer is B. \(-2x^2+9x-7=0\). Substituting in \(ax^2+bx+c=0\) gives \(-2x^2+9x-7=0\). Never ignore the sign of a coefficient.

Step 3

Exam Tip

मानक रूप \(ax^2+bx+c=0\) में मान रखने पर \(-2x^2+9x-7=0\) मिलता है। गुणांक का चिन्ह कभी न छोड़ें।

Open Question Page
Ask Friends

समीकरण \(6x^2-13x+5=0\) के लिए (2a+b-c) का मान क्या है?

For the equation \(6x^2-13x+5=0\), what is the value of (2a+b-c)?

Explanation opens after your attempt
Correct Answer

A. (-6)

Step 1

Concept

Here (a=6), (b=-13), (c=5). Hence (2a+b-c=12-13-5=-6).

Step 2

Why this answer is correct

The correct answer is A. (-6). Here (a=6), (b=-13), (c=5). Hence (2a+b-c=12-13-5=-6).

Step 3

Exam Tip

यहाँ (a=6), (b=-13), (c=5) हैं। इसलिए (2a+b-c=12-13-5=-6) है।

Open Question Page
Ask Friends

समीकरण \(x^2-4\sqrt{2}x+8=0\) में (b) का मान क्या है?

What is the value of (b) in \(x^2-4\sqrt{2}x+8=0\)?

Explanation opens after your attempt
Correct Answer

A. \(-4\sqrt{2}\)

Step 1

Concept

The coefficient attached to (x) is \(-4\sqrt{2}\). Keep the sign with radical coefficients too.

Step 2

Why this answer is correct

The correct answer is A. \(-4\sqrt{2}\). The coefficient attached to (x) is \(-4\sqrt{2}\). Keep the sign with radical coefficients too.

Step 3

Exam Tip

(x) के साथ लगा गुणांक \(-4\sqrt{2}\) है। करणी वाले गुणांक में भी चिन्ह साथ रखें।

Open Question Page
Ask Friends

किस समीकरण में (b=0) और (c>0) है?

Which equation has (b=0) and (c>0)?

Explanation opens after your attempt
Correct Answer

B. \(5x^2+20=0\)

Step 1

Concept

In \(5x^2+20=0\), the (x) term is absent, so (b=0) and (c=20>0). Treat a missing term coefficient as (0).

Step 2

Why this answer is correct

The correct answer is B. \(5x^2+20=0\). In \(5x^2+20=0\), the (x) term is absent, so (b=0) and (c=20>0). Treat a missing term coefficient as (0).

Step 3

Exam Tip

\(5x^2+20=0\) में (x) पद अनुपस्थित है, इसलिए (b=0) और (c=20>0) है। अनुपस्थित पद का गुणांक (0) मानें।

Open Question Page
Ask Friends