Class 9 Mathematics - Exploring Algebraic Identities - Factorisation Expert Quiz

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\(x^2+17x+72\) का गुणनखंड रूप कौन-सा है?

Which is the factorised form of \(x^2+17x+72\)?

Explanation opens after your attempt
Correct Answer

A. ((x+8)(x+9))सही गुणनखंड

Step 1

Concept

Here (8+9=17) and \(8\cdot9=72\). In exams choose factors of the constant whose sum is the middle coefficient.

Step 2

Why this answer is correct

The correct answer is A. ((x+8)(x+9)) / सही गुणनखंड. Here (8+9=17) and \(8\cdot9=72\). In exams choose factors of the constant whose sum is the middle coefficient.

Step 3

Exam Tip

(8+9=17) और \(8\cdot9=72\) है। परीक्षा में स्थिर पद के ऐसे गुणनखंड चुनें जिनका योग मध्य गुणांक हो।

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\(x^2-19x+90\) को गुणनखंडित करें।

Factorise \(x^2-19x+90\).

Explanation opens after your attempt
Correct Answer

B. ((x-9)(x-10))सही गुणनखंड

Step 1

Concept

Here (-9+(-10)=-19) and ((-9)(-10)=90). In exams use two negative signs when the constant is positive and the middle term is negative.

Step 2

Why this answer is correct

The correct answer is B. ((x-9)(x-10)) / सही गुणनखंड. Here (-9+(-10)=-19) and ((-9)(-10)=90). In exams use two negative signs when the constant is positive and the middle term is negative.

Step 3

Exam Tip

(-9+(-10)=-19) और ((-9)(-10)=90) है। परीक्षा में धनात्मक स्थिर पद और ऋणात्मक मध्य पद पर दोनों चिन्ह ऋणात्मक रखें।

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\(2x^2+11x+12\) का सही गुणनखंड रूप क्या है?

What is the correct factorised form of \(2x^2+11x+12\)?

Explanation opens after your attempt
Correct Answer

C. ((2x+3)(x+4))सही गुणनखंड

Step 1

Concept

((2x+3)(x+4)=2x-2+11x+12). In exams check the sum of cross terms (8x) and (3x).

Step 2

Why this answer is correct

The correct answer is C. ((2x+3)(x+4)) / सही गुणनखंड. ((2x+3)(x+4)=2x-2+11x+12). In exams check the sum of cross terms (8x) and (3x).

Step 3

Exam Tip

((2x+3)(x+4)=2x-2+11x+12) है। परीक्षा में क्रॉस पदों (8x) और (3x) का योग जांचें।

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\(3x^2-14x-5\) के गुणनखंड कौन-से हैं?

What are the factors of \(3x^2-14x-5\)?

Explanation opens after your attempt
Correct Answer

D. ((3x+1)(x-5))सही रूप

Step 1

Concept

((3x+1)(x-5)=3x-2-14x-5). In exams look for factors with opposite signs when the constant is negative.

Step 2

Why this answer is correct

The correct answer is D. ((3x+1)(x-5)) / सही रूप. ((3x+1)(x-5)=3x-2-14x-5). In exams look for factors with opposite signs when the constant is negative.

Step 3

Exam Tip

((3x+1)(x-5)=3x-2-14x-5) है। परीक्षा में ऋणात्मक स्थिर पद के लिए विपरीत चिन्हों वाले गुणनखंड देखें।

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\(4a^2-12ab+9b^2\) का गुणनखंड रूप क्या होगा?

What will be the factorised form of \(4a^2-12ab+9b^2\)?

Explanation opens after your attempt
Correct Answer

A. ((2a-3b)2)सही पूर्ण वर्ग

Step 1

Concept

(4a-2=(2a)2), (9b-2=(3b)2), and the middle term is (-12ab). In exams the sign of the middle term is decisive in a perfect square.

Step 2

Why this answer is correct

The correct answer is A. ((2a-3b)2) / सही पूर्ण वर्ग. (4a-2=(2a)2), (9b-2=(3b)2), and the middle term is (-12ab). In exams the sign of the middle term is decisive in a perfect square.

Step 3

Exam Tip

(4a-2=(2a)2), (9b-2=(3b)2) और मध्य पद (-12ab) है। परीक्षा में पूर्ण वर्ग में मध्य पद का चिन्ह निर्णायक होता है।

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\(25m^2-49n^2\) को गुणनखंडित करें।

Factorise \(25m^2-49n^2\).

Explanation opens after your attempt
Correct Answer

B. ((5m-7n)(5m+7n))सही वर्गों का अंतर

Step 1

Concept

(25m-2=(5m)2) and (49n-2=(7n)2). In exams take the correct square root of both terms.

Step 2

Why this answer is correct

The correct answer is B. ((5m-7n)(5m+7n)) / सही वर्गों का अंतर. (25m-2=(5m)2) and (49n-2=(7n)2). In exams take the correct square root of both terms.

Step 3

Exam Tip

(25m-2=(5m)2) और (49n-2=(7n)2) है। परीक्षा में दोनों पदों का सही वर्गमूल लें।

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\(6x^2+13x+6\) का सही गुणनखंड रूप चुनें।

Choose the correct factorised form of \(6x^2+13x+6\).

Explanation opens after your attempt
Correct Answer

C. ((3x+2)(2x+3))सही रूप

Step 1

Concept

((3x+2)(2x+3)=6x-2+13x+6). In exams the outer and inner terms must add to (13x).

Step 2

Why this answer is correct

The correct answer is C. ((3x+2)(2x+3)) / सही रूप. ((3x+2)(2x+3)=6x-2+13x+6). In exams the outer and inner terms must add to (13x).

Step 3

Exam Tip

((3x+2)(2x+3)=6x-2+13x+6) है। परीक्षा में बाहरी और अंदरूनी पदों का योग (13x) होना चाहिए।

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(ab+2a-5b-10) को समूहीकरण से गुणनखंडित करें।

Factorise (ab+2a-5b-10) by grouping.

Explanation opens after your attempt
Correct Answer

D. ((a-5)(b+2))सही रूप

Step 1

Concept

The grouping gives (a(b+2)-5(b+2)). In exams you may need to take a negative factor from the second group.

Step 2

Why this answer is correct

The correct answer is D. ((a-5)(b+2)) / सही रूप. The grouping gives (a(b+2)-5(b+2)). In exams you may need to take a negative factor from the second group.

Step 3

Exam Tip

समूह (a(b+2)-5(b+2)) बनता है। परीक्षा में दूसरे समूह से ऋणात्मक गुणनखंड निकालना पड़ सकता है।

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\(8x^3-27\) को पहचान से गुणनखंडित करें।

Factorise \(8x^3-27\) using an identity.

Explanation opens after your attempt
Correct Answer

A. ((2x-3)\(4x^2+6x+9\))सही घनों का अंतर

Step 1

Concept

It is ((2x)3-33). In exams apply (a-3-b-3=(a-b)\(a^2+ab+b^2\)) with signs carefully.

Step 2

Why this answer is correct

The correct answer is A. ((2x-3)\(4x^2+6x+9\)) / सही घनों का अंतर. It is ((2x)3-33). In exams apply (a-3-b-3=(a-b)\(a^2+ab+b^2\)) with signs carefully.

Step 3

Exam Tip

यह ((2x)3-33) है। परीक्षा में (a-3-b-3=(a-b)\(a^2+ab+b^2\)) का चिन्ह ध्यान से लगाएं।

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\(27a^3+64b^3\) का गुणनखंड रूप क्या है?

What is the factorised form of \(27a^3+64b^3\)?

Explanation opens after your attempt
Correct Answer

A. ((3a+4b)\(9a^2-12ab+16b^2\))सही घनों का योग

Step 1

Concept

It is ((3a)3+(4b)3). In exams the middle term in the second bracket is negative for sum of cubes.

Step 2

Why this answer is correct

The correct answer is A. ((3a+4b)\(9a^2-12ab+16b^2\)) / सही घनों का योग. It is ((3a)3+(4b)3). In exams the middle term in the second bracket is negative for sum of cubes.

Step 3

Exam Tip

यह ((3a)3+(4b)3) है। परीक्षा में घनों के योग में दूसरे कोष्ठक का मध्य पद ऋणात्मक होता है।

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\(x^3+3x^2+3x+1\) का गुणनखंड रूप चुनें।

Choose the factorised form of \(x^3+3x^2+3x+1\).

Explanation opens after your attempt
Correct Answer

B. ((x+1)3)सही पूर्ण घन

Step 1

Concept

This is the expansion of ((x+1)3). In exams coefficients (1,3,3,1) indicate a perfect cube.

Step 2

Why this answer is correct

The correct answer is B. ((x+1)3) / सही पूर्ण घन. This is the expansion of ((x+1)3). In exams coefficients (1,3,3,1) indicate a perfect cube.

Step 3

Exam Tip

यह ((x+1)3) का विस्तार है। परीक्षा में (1,3,3,1) गुणांक पूर्ण घन का संकेत देते हैं।

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\(x^3-6x^2+12x-8\) को गुणनखंडित करें।

Factorise \(x^3-6x^2+12x-8\).

Explanation opens after your attempt
Correct Answer

C. ((x-2)3)सही पूर्ण घन

Step 1

Concept

It is ((x-2)3) because the expansion gives \(x^3-6x^2+12x-8\). In exams match the signs of a perfect cube in order.

Step 2

Why this answer is correct

The correct answer is C. ((x-2)3) / सही पूर्ण घन. It is ((x-2)3) because the expansion gives \(x^3-6x^2+12x-8\). In exams match the signs of a perfect cube in order.

Step 3

Exam Tip

यह ((x-2)3) है क्योंकि विस्तार \(x^3-6x^2+12x-8\) मिलता है। परीक्षा में पूर्ण घन के संकेतों को क्रम से मिलाएं।

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\(2x^2y+6xy+4y\) का पूर्ण गुणनखंड रूप क्या है?

What is the complete factorised form of \(2x^2y+6xy+4y\)?

Explanation opens after your attempt
Correct Answer

B. (2y(x+1)(x+2))सही पूर्ण रूप

Step 1

Concept

First take out (2y), then (x-2+3x+2=(x+1)(x+2)). In exams check the trinomial after taking the common factor.

Step 2

Why this answer is correct

The correct answer is B. (2y(x+1)(x+2)) / सही पूर्ण रूप. First take out (2y), then (x-2+3x+2=(x+1)(x+2)). In exams check the trinomial after taking the common factor.

Step 3

Exam Tip

पहले (2y) निकालें, फिर (x-2+3x+2=(x+1)(x+2)) है। परीक्षा में समान गुणनखंड के बाद त्रिपद भी जांचें।

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\(4x^2-20x+25\) का गुणनखंड रूप क्या होगा?

What will be the factorised form of \(4x^2-20x+25\)?

Explanation opens after your attempt
Correct Answer

D. ((2x-5)2)सही पूर्ण वर्ग

Step 1

Concept

(4x-2=(2x)2), \(25=5^2\), and \(-20x=-2\cdot2x\cdot5\). In exams decide the sign from the middle term.

Step 2

Why this answer is correct

The correct answer is D. ((2x-5)2) / सही पूर्ण वर्ग. (4x-2=(2x)2), \(25=5^2\), and \(-20x=-2\cdot2x\cdot5\). In exams decide the sign from the middle term.

Step 3

Exam Tip

(4x-2=(2x)2), \(25=5^2\) और \(-20x=-2\cdot2x\cdot5\) है। परीक्षा में मध्य पद से चिन्ह तय करें।

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\(9p^2-24pq+16q^2\) का सही गुणनखंड रूप चुनें।

Choose the correct factorised form of \(9p^2-24pq+16q^2\).

Explanation opens after your attempt
Correct Answer

A. ((3p-4q)2)सही उत्तर

Step 1

Concept

The two square terms come from (3p) and (4q), and the middle term is negative. In exams match all three terms of the perfect square.

Step 2

Why this answer is correct

The correct answer is A. ((3p-4q)2) / सही उत्तर. The two square terms come from (3p) and (4q), and the middle term is negative. In exams match all three terms of the perfect square.

Step 3

Exam Tip

दो वर्ग पद (3p) और (4q) से बनते हैं तथा मध्य पद ऋणात्मक है। परीक्षा में पूर्ण वर्ग के तीनों पद मिलाएं।

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\(x^2-2xy+y^2-z^2\) को गुणनखंडित करें।

Factorise \(x^2-2xy+y^2-z^2\).

Explanation opens after your attempt
Correct Answer

A. ((x-y-z)(x-y+z))सही रूप

Step 1

Concept

First (x-2-2xy+y-2=(x-y)2), then apply difference of squares. In exams group first and apply the identity.

Step 2

Why this answer is correct

The correct answer is A. ((x-y-z)(x-y+z)) / सही रूप. First (x-2-2xy+y-2=(x-y)2), then apply difference of squares. In exams group first and apply the identity.

Step 3

Exam Tip

पहले (x-2-2xy+y-2=(x-y)2), फिर वर्गों का अंतर लगाएं। परीक्षा में पहले समूह बनाकर पहचान लगाएं।

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\(a^2+2ab+b^2-c^2\) का पूर्ण गुणनखंड रूप क्या है?

What is the complete factorised form of \(a^2+2ab+b^2-c^2\)?

Explanation opens after your attempt
Correct Answer

A. ((a+b+c)(a+b-c))सही रूप

Step 1

Concept

First (a-2+2ab+b-2=(a+b)2), then apply difference of squares. In exams treat the perfect-square group as one term.

Step 2

Why this answer is correct

The correct answer is A. ((a+b+c)(a+b-c)) / सही रूप. First (a-2+2ab+b-2=(a+b)2), then apply difference of squares. In exams treat the perfect-square group as one term.

Step 3

Exam Tip

पहले (a-2+2ab+b-2=(a+b)2), फिर वर्गों का अंतर लगाएं। परीक्षा में पूर्ण वर्ग समूह को एक पद मानें।

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\(x^4-16\) को पूर्णतः गुणनखंडित करें।

Completely factorise \(x^4-16\).

Explanation opens after your attempt
Correct Answer

B. ((x-2)(x+2)\(x^2+4\))पूर्ण रूप

Step 1

Concept

(x-4-16=\(x^2-4\)\(x^2+4\)) and (x-2-4=(x-2)(x+2)). In exams do not stop at partial factorisation.

Step 2

Why this answer is correct

The correct answer is B. ((x-2)(x+2)\(x^2+4\)) / पूर्ण रूप. (x-4-16=\(x^2-4\)\(x^2+4\)) and (x-2-4=(x-2)(x+2)). In exams do not stop at partial factorisation.

Step 3

Exam Tip

(x-4-16=\(x^2-4\)\(x^2+4\)) और (x-2-4=(x-2)(x+2)) है। परीक्षा में आंशिक गुणनखंड पर न रुकें।

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\(16x^4-81y^4\) का पूर्ण गुणनखंड रूप कौन-सा है?

Which is the complete factorised form of \(16x^4-81y^4\)?

Explanation opens after your attempt
Correct Answer

B. ((2x-3y)(2x+3y)\(4x^2+9y^2\))सही पूर्ण रूप

Step 1

Concept

It is (\(4x^2\)2-\(9y^2\)2), and \(4x^2-9y^2\) factors again. In exams check difference of squares repeatedly.

Step 2

Why this answer is correct

The correct answer is B. ((2x-3y)(2x+3y)\(4x^2+9y^2\)) / सही पूर्ण रूप. It is (\(4x^2\)2-\(9y^2\)2), and \(4x^2-9y^2\) factors again. In exams check difference of squares repeatedly.

Step 3

Exam Tip

यह (\(4x^2\)2-\(9y^2\)2) है और \(4x^2-9y^2\) फिर टूटता है। परीक्षा में बार-बार वर्गों का अंतर जांचें।

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\(x^2+xy-12y^2\) का सही गुणनखंड रूप क्या है?

What is the correct factorised form of \(x^2+xy-12y^2\)?

Explanation opens after your attempt
Correct Answer

A. ((x+4y)(x-3y))सही रूप

Step 1

Concept

Here (4y+(-3y)=y) and (4y\cdot(-3y)=-12y-2). In exams add signed terms with variables.

Step 2

Why this answer is correct

The correct answer is A. ((x+4y)(x-3y)) / सही रूप. Here (4y+(-3y)=y) and (4y\cdot(-3y)=-12y-2). In exams add signed terms with variables.

Step 3

Exam Tip

(4y+(-3y)=y) और (4y\cdot(-3y)=-12y-2) है। परीक्षा में चर सहित चिन्हों का योग करें।

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\(2x^2-xy-15y^2\) के गुणनखंड कौन-से हैं?

What are the factors of \(2x^2-xy-15y^2\)?

Explanation opens after your attempt
Correct Answer

A. ((2x+5y)(x-3y))सही रूप

Step 1

Concept

((2x+5y)(x-3y)=2x-2-xy-15y-2). In exams add cross terms (5xy) and (-6xy).

Step 2

Why this answer is correct

The correct answer is A. ((2x+5y)(x-3y)) / सही रूप. ((2x+5y)(x-3y)=2x-2-xy-15y-2). In exams add cross terms (5xy) and (-6xy).

Step 3

Exam Tip

((2x+5y)(x-3y)=2x-2-xy-15y-2) है। परीक्षा में क्रॉस पदों (5xy) और (-6xy) को जोड़ें।

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\(3a^2+5ab-2b^2\) का सही गुणनखंड रूप चुनें।

Choose the correct factorised form of \(3a^2+5ab-2b^2\).

Explanation opens after your attempt
Correct Answer

A. ((3a-b)(a+2b))सही रूप

Step 1

Concept

((3a-b)(a+2b)=3a-2+5ab-2b-2). In exams check cross terms with opposite signs.

Step 2

Why this answer is correct

The correct answer is A. ((3a-b)(a+2b)) / सही रूप. ((3a-b)(a+2b)=3a-2+5ab-2b-2). In exams check cross terms with opposite signs.

Step 3

Exam Tip

((3a-b)(a+2b)=3a-2+5ab-2b-2) है। परीक्षा में विपरीत चिन्हों के साथ क्रॉस पद जांचें।

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\(6p^2-pq-2q^2\) को गुणनखंडित करें।

Factorise \(6p^2-pq-2q^2\).

Explanation opens after your attempt
Correct Answer

B. ((2p+q)(3p-2q))सही रूप

Step 1

Concept

((2p+q)(3p-2q)=6p-2-pq-2q-2). In exams add cross terms (-4pq) and (3pq).

Step 2

Why this answer is correct

The correct answer is B. ((2p+q)(3p-2q)) / सही रूप. ((2p+q)(3p-2q)=6p-2-pq-2q-2). In exams add cross terms (-4pq) and (3pq).

Step 3

Exam Tip

((2p+q)(3p-2q)=6p-2-pq-2q-2) है। परीक्षा में क्रॉस पद (-4pq) और (3pq) जोड़ें।

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\(12x^2+7x-10\) का गुणनखंड रूप क्या है?

What is the factorised form of \(12x^2+7x-10\)?

Explanation opens after your attempt
Correct Answer

A. ((3x-2)(4x+5))सही रूप

Step 1

Concept

((3x-2)(4x+5)=12x-2+7x-10). In exams see that (15x) and (-8x) add to (7x).

Step 2

Why this answer is correct

The correct answer is A. ((3x-2)(4x+5)) / सही रूप. ((3x-2)(4x+5)=12x-2+7x-10). In exams see that (15x) and (-8x) add to (7x).

Step 3

Exam Tip

((3x-2)(4x+5)=12x-2+7x-10) है। परीक्षा में (15x) और (-8x) का योग (7x) देखें।

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\(15x^2-22x+8\) का सही गुणनखंड रूप कौन-सा है?

Which is the correct factorised form of \(15x^2-22x+8\)?

Explanation opens after your attempt
Correct Answer

A. ((3x-2)(5x-4))सही रूप

Step 1

Concept

((3x-2)(5x-4)=15x-2-22x+8). In exams both signs can be negative when the constant is positive and the middle term is negative.

Step 2

Why this answer is correct

The correct answer is A. ((3x-2)(5x-4)) / सही रूप. ((3x-2)(5x-4)=15x-2-22x+8). In exams both signs can be negative when the constant is positive and the middle term is negative.

Step 3

Exam Tip

((3x-2)(5x-4)=15x-2-22x+8) है। परीक्षा में धनात्मक स्थिर पद और ऋणात्मक मध्य पद पर दोनों चिन्ह ऋणात्मक हो सकते हैं।

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\(20x^2+9x-20\) को गुणनखंडित करें।

Factorise \(20x^2+9x-20\).

Explanation opens after your attempt
Correct Answer

A. ((4x-5)(5x+4))सही रूप

Step 1

Concept

((4x-5)(5x+4)=20x-2+9x-20). In exams expand the option carefully to check the cross terms.

Step 2

Why this answer is correct

The correct answer is A. ((4x-5)(5x+4)) / सही रूप. ((4x-5)(5x+4)=20x-2+9x-20). In exams expand the option carefully to check the cross terms.

Step 3

Exam Tip

((4x-5)(5x+4)=20x-2+9x-20) है। परीक्षा में क्रॉस पद (16x) और (-25x) नहीं, सही विकल्प का विस्तार जांचें।

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\(4x^2+4xy+y^2-9z^2\) का पूर्ण गुणनखंड रूप क्या है?

What is the complete factorised form of \(4x^2+4xy+y^2-9z^2\)?

Explanation opens after your attempt
Correct Answer

A. ((2x+y-3z)(2x+y+3z))सही रूप

Step 1

Concept

First (4x-2+4xy+y-2=(2x+y)2), then apply difference of squares. In exams treat the group as one term.

Step 2

Why this answer is correct

The correct answer is A. ((2x+y-3z)(2x+y+3z)) / सही रूप. First (4x-2+4xy+y-2=(2x+y)2), then apply difference of squares. In exams treat the group as one term.

Step 3

Exam Tip

पहले (4x-2+4xy+y-2=(2x+y)2), फिर वर्गों का अंतर लगाएं। परीक्षा में समूह को एक पद मानें।

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\(x^2-4xy+4y^2-25\) का गुणनखंड रूप चुनें।

Choose the factorised form of \(x^2-4xy+4y^2-25\).

Explanation opens after your attempt
Correct Answer

A. ((x-2y-5)(x-2y+5))सही रूप

Step 1

Concept

First (x-2-4xy+4y-2=(x-2y)2), then use \(25=5^2\). In exams identify the perfect-square trinomial.

Step 2

Why this answer is correct

The correct answer is A. ((x-2y-5)(x-2y+5)) / सही रूप. First (x-2-4xy+4y-2=(x-2y)2), then use \(25=5^2\). In exams identify the perfect-square trinomial.

Step 3

Exam Tip

पहले (x-2-4xy+4y-2=(x-2y)2), फिर \(25=5^2\) लगाएं। परीक्षा में पूर्ण वर्ग त्रिपद को पहचानें।

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(ax+ay-bx-by+cx+cy) का गुणनखंड रूप क्या है?

What is the factorised form of (ax+ay-bx-by+cx+cy)?

Explanation opens after your attempt
Correct Answer

A. ((x+y)(a-b+c))सही रूप

Step 1

Concept

The common binomial is (x+y), leaving coefficient (a-b+c). In exams take common binomials with signs.

Step 2

Why this answer is correct

The correct answer is A. ((x+y)(a-b+c)) / सही रूप. The common binomial is (x+y), leaving coefficient (a-b+c). In exams take common binomials with signs.

Step 3

Exam Tip

हर समूह में (x+y) समान है और गुणांक (a-b+c) बचता है। परीक्षा में चिन्ह सहित समान द्विपद निकालें।

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(2xy-3x+4y-6) को समूहीकरण से गुणनखंडित करें।

Factorise (2xy-3x+4y-6) by grouping.

Explanation opens after your attempt
Correct Answer

A. ((x+2)(2y-3))सही रूप

Step 1

Concept

The grouping gives (x(2y-3)+2(2y-3)). In exams take out the common bracket as soon as it appears.

Step 2

Why this answer is correct

The correct answer is A. ((x+2)(2y-3)) / सही रूप. The grouping gives (x(2y-3)+2(2y-3)). In exams take out the common bracket as soon as it appears.

Step 3

Exam Tip

समूह (x(2y-3)+2(2y-3)) बनता है। परीक्षा में समान कोष्ठक बनने पर तुरंत बाहर निकालें।

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(6ab-9a+10b-15) का गुणनखंड रूप कौन-सा है?

Which is the factorised form of (6ab-9a+10b-15)?

Explanation opens after your attempt
Correct Answer

A. ((3a+5)(2b-3))सही रूप

Step 1

Concept

The grouping gives (3a(2b-3)+5(2b-3)). In exams make the same bracket from both groups.

Step 2

Why this answer is correct

The correct answer is A. ((3a+5)(2b-3)) / सही रूप. The grouping gives (3a(2b-3)+5(2b-3)). In exams make the same bracket from both groups.

Step 3

Exam Tip

समूह (3a(2b-3)+5(2b-3)) बनता है। परीक्षा में दोनों समूहों से एक जैसा कोष्ठक बनाएं।

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\(x^4+2x^2+1\) का गुणनखंड रूप क्या है?

What is the factorised form of \(x^4+2x^2+1\)?

Explanation opens after your attempt
Correct Answer

A. (\(x^2+1\)2)सही पूर्ण वर्ग

Step 1

Concept

It is the square of the sum of \(x^2\) and (1). In exams identify (x-4=\(x^2\)2).

Step 2

Why this answer is correct

The correct answer is A. (\(x^2+1\)2) / सही पूर्ण वर्ग. It is the square of the sum of \(x^2\) and (1). In exams identify (x-4=\(x^2\)2).

Step 3

Exam Tip

यह \(x^2\) और (1) के योग का वर्ग है। परीक्षा में (x-4=\(x^2\)2) पहचानें।

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\(y^4-10y^2+25\) को गुणनखंडित करें।

Factorise \(y^4-10y^2+25\).

Explanation opens after your attempt
Correct Answer

A. (\(y^2-5\)2)सही पूर्ण वर्ग

Step 1

Concept

It is (\(y^2\)2-2\cdot y-2\cdot5+52). In exams treat \(y^2\) as one term and apply the identity.

Step 2

Why this answer is correct

The correct answer is A. (\(y^2-5\)2) / सही पूर्ण वर्ग. It is (\(y^2\)2-2\cdot y-2\cdot5+52). In exams treat \(y^2\) as one term and apply the identity.

Step 3

Exam Tip

यह (\(y^2\)2-2\cdot y-2\cdot5+52) है। परीक्षा में \(y^2\) को एक पद मानकर पहचान लगाएं।

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\(x^4-2x^2y^2+y^4\) का सही गुणनखंड रूप चुनें।

Choose the correct factorised form of \(x^4-2x^2y^2+y^4\).

Explanation opens after your attempt
Correct Answer

B. ((x-y)2(x+y)2)पूर्ण रूप

Step 1

Concept

First it is (\(x^2-y^2\)2), and (x-2-y-2=(x-y)(x+y)). In exams continue until complete factorisation.

Step 2

Why this answer is correct

The correct answer is B. ((x-y)2(x+y)2) / पूर्ण रूप. First it is (\(x^2-y^2\)2), and (x-2-y-2=(x-y)(x+y)). In exams continue until complete factorisation.

Step 3

Exam Tip

पहले यह (\(x^2-y^2\)2) है और (x-2-y-2=(x-y)(x+y)) है। परीक्षा में पूर्ण गुणनखंड तक जाएं।

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\(x^4-y^4\) का पूर्ण गुणनखंड रूप क्या है?

What is the complete factorised form of \(x^4-y^4\)?

Explanation opens after your attempt
Correct Answer

B. ((x-y)(x+y)\(x^2+y^2\))सही पूर्ण रूप

Step 1

Concept

(x-4-y-4=\(x^2-y^2\)\(x^2+y^2\)), and \(x^2-y^2\) factors again. In exams check difference of squares twice.

Step 2

Why this answer is correct

The correct answer is B. ((x-y)(x+y)\(x^2+y^2\)) / सही पूर्ण रूप. (x-4-y-4=\(x^2-y^2\)\(x^2+y^2\)), and \(x^2-y^2\) factors again. In exams check difference of squares twice.

Step 3

Exam Tip

(x-4-y-4=\(x^2-y^2\)\(x^2+y^2\)) और \(x^2-y^2\) फिर टूटता है। परीक्षा में दो बार वर्गों का अंतर देखें।

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\(3x^3+12x^2+12x\) का पूर्ण गुणनखंड रूप कौन-सा है?

Which is the complete factorised form of \(3x^3+12x^2+12x\)?

Explanation opens after your attempt
Correct Answer

A. (3x(x+2)2)सही रूप

Step 1

Concept

First take out (3x), and the remaining (x-2+4x+4=(x+2)2). In exams identify a perfect square after taking the common factor.

Step 2

Why this answer is correct

The correct answer is A. (3x(x+2)2) / सही रूप. First take out (3x), and the remaining (x-2+4x+4=(x+2)2). In exams identify a perfect square after taking the common factor.

Step 3

Exam Tip

पहले (3x) निकालें और शेष (x-2+4x+4=(x+2)2) है। परीक्षा में समान गुणनखंड के बाद पूर्ण वर्ग पहचानें।

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\(5a^3-20a^2b+20ab^2\) का पूर्ण गुणनखंड रूप क्या होगा?

What will be the complete factorised form of \(5a^3-20a^2b+20ab^2\)?

Explanation opens after your attempt
Correct Answer

A. (5a(a-2b)2)सही रूप

Step 1

Concept

First take out (5a), and the remaining (a-2-4ab+4b-2=(a-2b)2). In exams look for a perfect square inside the bracket.

Step 2

Why this answer is correct

The correct answer is A. (5a(a-2b)2) / सही रूप. First take out (5a), and the remaining (a-2-4ab+4b-2=(a-2b)2). In exams look for a perfect square inside the bracket.

Step 3

Exam Tip

पहले (5a) निकालें और शेष (a-2-4ab+4b-2=(a-2b)2) है। परीक्षा में कोष्ठक के अंदर पूर्ण वर्ग देखें।

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\(2x^3-18x\) को पूर्णतः गुणनखंडित करें।

Completely factorise \(2x^3-18x\).

Explanation opens after your attempt
Correct Answer

A. (2x(x-3)(x+3))सही रूप

Step 1

Concept

First take out (2x), and \(x^2-9\) is a difference of squares. In exams check the inside identity after the common factor.

Step 2

Why this answer is correct

The correct answer is A. (2x(x-3)(x+3)) / सही रूप. First take out (2x), and \(x^2-9\) is a difference of squares. In exams check the inside identity after the common factor.

Step 3

Exam Tip

पहले (2x) निकालें और \(x^2-9\) वर्गों का अंतर है। परीक्षा में समान गुणनखंड के बाद अंदर की पहचान देखें।

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\(7x^2-28xy+28y^2\) का गुणनखंड रूप कौन-सा है?

Which is the factorised form of \(7x^2-28xy+28y^2\)?

Explanation opens after your attempt
Correct Answer

A. (7(x-2y)2)सही रूप

Step 1

Concept

First take out (7), and the remaining (x-2-4xy+4y-2=(x-2y)2). In exams identify the perfect square after the common factor.

Step 2

Why this answer is correct

The correct answer is A. (7(x-2y)2) / सही रूप. First take out (7), and the remaining (x-2-4xy+4y-2=(x-2y)2). In exams identify the perfect square after the common factor.

Step 3

Exam Tip

पहले (7) निकालें और शेष (x-2-4xy+4y-2=(x-2y)2) है। परीक्षा में सामान्य गुणनखंड के बाद पूर्ण वर्ग पहचानें।

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\(x^3+x^2-x-1\) को समूहीकरण से गुणनखंडित करें।

Factorise \(x^3+x^2-x-1\) by grouping.

Explanation opens after your attempt
Correct Answer

A. ((x+1)2(x-1))सही रूप

Step 1

Concept

The grouping gives (x-2(x+1)-1(x+1)), then \(x^2-1\) also factors. In exams check again after partial factorisation.

Step 2

Why this answer is correct

The correct answer is A. ((x+1)2(x-1)) / सही रूप. The grouping gives (x-2(x+1)-1(x+1)), then \(x^2-1\) also factors. In exams check again after partial factorisation.

Step 3

Exam Tip

समूह (x-2(x+1)-1(x+1)) बनता है, फिर \(x^2-1\) भी टूटता है। परीक्षा में आंशिक गुणनखंड के बाद फिर जांचें।

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\(x^3-4x^2-x+4\) का गुणनखंड रूप क्या है?

What is the factorised form of \(x^3-4x^2-x+4\)?

Explanation opens after your attempt
Correct Answer

A. ((x-4)(x-1)(x+1))सही रूप

Step 1

Concept

The grouping gives (x-2(x-4)-1(x-4)), and \(x^2-1\) factors. In exams look for both common bracket and difference of squares.

Step 2

Why this answer is correct

The correct answer is A. ((x-4)(x-1)(x+1)) / सही रूप. The grouping gives (x-2(x-4)-1(x-4)), and \(x^2-1\) factors. In exams look for both common bracket and difference of squares.

Step 3

Exam Tip

समूह (x-2(x-4)-1(x-4)) बनता है और \(x^2-1\) टूटता है। परीक्षा में समान कोष्ठक और वर्गों का अंतर दोनों देखें।

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\(2x^3+3x^2-8x-12\) का सही गुणनखंड रूप कौन-सा है?

Which is the correct factorised form of \(2x^3+3x^2-8x-12\)?

Explanation opens after your attempt
Correct Answer

A. ((2x+3)(x-2)(x+2))सही रूप

Step 1

Concept

The grouping gives (x-2(2x+3)-4(2x+3)), and \(x^2-4\) factors. In exams factorise the remaining binomial after grouping.

Step 2

Why this answer is correct

The correct answer is A. ((2x+3)(x-2)(x+2)) / सही रूप. The grouping gives (x-2(2x+3)-4(2x+3)), and \(x^2-4\) factors. In exams factorise the remaining binomial after grouping.

Step 3

Exam Tip

समूह (x-2(2x+3)-4(2x+3)) बनता है और \(x^2-4\) टूटता है। परीक्षा में समूह के बाद बचे द्विपद को भी गुणनखंडित करें।

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\(3x^3-5x^2+12x-20\) को समूहीकरण से गुणनखंडित करें।

Factorise \(3x^3-5x^2+12x-20\) by grouping.

Explanation opens after your attempt
Correct Answer

A. ((3x-5)\(x^2+4\))सही रूप

Step 1

Concept

The grouping gives (x-2(3x-5)+4(3x-5)). In exams do not factor \(x^2+4\) into real linear factors.

Step 2

Why this answer is correct

The correct answer is A. ((3x-5)\(x^2+4\)) / सही रूप. The grouping gives (x-2(3x-5)+4(3x-5)). In exams do not factor \(x^2+4\) into real linear factors.

Step 3

Exam Tip

समूह (x-2(3x-5)+4(3x-5)) बनता है। परीक्षा में \(x^2+4\) को वास्तविक रैखिक गुणनखंडों में न तोड़ें।

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\(a^3-b^3+a^2b-ab^2\) का गुणनखंड रूप क्या है?

What is the factorised form of \(a^3-b^3+a^2b-ab^2\)?

Explanation opens after your attempt
Correct Answer

A. ((a-b)(a+b)2)सही रूप

Step 1

Concept

Grouping (\(a^3-b^3\)+ab(a-b)) gives ((a-b)\(a^2+ab+b^2+ab\)). In exams check whether the final bracket forms a perfect square.

Step 2

Why this answer is correct

The correct answer is A. ((a-b)(a+b)2) / सही रूप. Grouping (\(a^3-b^3\)+ab(a-b)) gives ((a-b)\(a^2+ab+b^2+ab\)). In exams check whether the final bracket forms a perfect square.

Step 3

Exam Tip

समूह (\(a^3-b^3\)+ab(a-b)) से ((a-b)\(a^2+ab+b^2+ab\)) मिलता है। परीक्षा में अंत में पूर्ण वर्ग बनने की संभावना देखें।

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\(x^2-y^2+2x+2y\) का गुणनखंड रूप चुनें।

Choose the factorised form of \(x^2-y^2+2x+2y\).

Explanation opens after your attempt
Correct Answer

A. ((x+y)(x-y+2))सही रूप

Step 1

Concept

(x-2-y-2=(x-y)(x+y)) and (2x+2y=2(x+y)). In exams take common ((x+y)).

Step 2

Why this answer is correct

The correct answer is A. ((x+y)(x-y+2)) / सही रूप. (x-2-y-2=(x-y)(x+y)) and (2x+2y=2(x+y)). In exams take common ((x+y)).

Step 3

Exam Tip

(x-2-y-2=(x-y)(x+y)) और (2x+2y=2(x+y)) है। परीक्षा में समान ((x+y)) को बाहर निकालें।

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\(a^2-b^2-3a+3b\) को गुणनखंडित करें।

Factorise \(a^2-b^2-3a+3b\).

Explanation opens after your attempt
Correct Answer

A. ((a-b)(a+b-3))सही रूप

Step 1

Concept

(a-2-b-2=(a-b)(a+b)) and (-3a+3b=-3(a-b)). In exams identify common ((a-b)).

Step 2

Why this answer is correct

The correct answer is A. ((a-b)(a+b-3)) / सही रूप. (a-2-b-2=(a-b)(a+b)) and (-3a+3b=-3(a-b)). In exams identify common ((a-b)).

Step 3

Exam Tip

(a-2-b-2=(a-b)(a+b)) और (-3a+3b=-3(a-b)) है। परीक्षा में समान ((a-b)) पहचानें।

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\(x^2+2xy+y^2-4x-4y\) का गुणनखंड रूप क्या है?

What is the factorised form of \(x^2+2xy+y^2-4x-4y\)?

Explanation opens after your attempt
Correct Answer

A. ((x+y)(x+y-4))सही रूप

Step 1

Concept

First (x-2+2xy+y-2=(x+y)2) and (-4x-4y=-4(x+y)). In exams treat (x+y) as one term.

Step 2

Why this answer is correct

The correct answer is A. ((x+y)(x+y-4)) / सही रूप. First (x-2+2xy+y-2=(x+y)2) and (-4x-4y=-4(x+y)). In exams treat (x+y) as one term.

Step 3

Exam Tip

पहले (x-2+2xy+y-2=(x+y)2) और (-4x-4y=-4(x+y)) है। परीक्षा में (x+y) को एक पद मानें।

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\(4x^2-12xy+9y^2-25z^2\) का पूर्ण गुणनखंड रूप कौन-सा है?

Which is the complete factorised form of \(4x^2-12xy+9y^2-25z^2\)?

Explanation opens after your attempt
Correct Answer

A. ((2x-3y-5z)(2x-3y+5z))सही रूप

Step 1

Concept

First (4x-2-12xy+9y-2=(2x-3y)2), then apply difference of squares. In exams take the square root of the group correctly.

Step 2

Why this answer is correct

The correct answer is A. ((2x-3y-5z)(2x-3y+5z)) / सही रूप. First (4x-2-12xy+9y-2=(2x-3y)2), then apply difference of squares. In exams take the square root of the group correctly.

Step 3

Exam Tip

पहले (4x-2-12xy+9y-2=(2x-3y)2), फिर वर्गों का अंतर लगाएं। परीक्षा में समूह का वर्गमूल सही लें।

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\(9a^2+12ab+4b^2-16c^2\) को गुणनखंडित करें।

Factorise \(9a^2+12ab+4b^2-16c^2\).

Explanation opens after your attempt
Correct Answer

A. ((3a+2b-4c)(3a+2b+4c))सही रूप

Step 1

Concept

First (9a-2+12ab+4b-2=(3a+2b)2), then use (16c-2=(4c)2). In exams apply difference of squares after forming the perfect square group.

Step 2

Why this answer is correct

The correct answer is A. ((3a+2b-4c)(3a+2b+4c)) / सही रूप. First (9a-2+12ab+4b-2=(3a+2b)2), then use (16c-2=(4c)2). In exams apply difference of squares after forming the perfect square group.

Step 3

Exam Tip

पहले (9a-2+12ab+4b-2=(3a+2b)2), फिर (16c-2=(4c)2) लगाएं। परीक्षा में पूर्ण वर्ग समूह के बाद वर्गों का अंतर करें।

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\(x^3+8y^3+x^2y+2xy^2\) का गुणनखंड रूप क्या है?

What is the factorised form of \(x^3+8y^3+x^2y+2xy^2\)?

Explanation opens after your attempt
Correct Answer

B. ((x+2y)\(x^2+4y^2\))सही सरल रूप

Step 1

Concept

(x-3+8y-3=(x+2y)\(x^2-2xy+4y^2\)) and (x-2y+2xy-2=xy(x+2y)). In exams simplify inside terms after a common binomial appears.

Step 2

Why this answer is correct

The correct answer is B. ((x+2y)\(x^2+4y^2\)) / सही सरल रूप. (x-3+8y-3=(x+2y)\(x^2-2xy+4y^2\)) and (x-2y+2xy-2=xy(x+2y)). In exams simplify inside terms after a common binomial appears.

Step 3

Exam Tip

(x-3+8y-3=(x+2y)\(x^2-2xy+4y^2\)) और (x-2y+2xy-2=xy(x+2y)) है। परीक्षा में समान द्विपद बनने पर अंदर के पद सरल करें।

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