Let q should be subtracted. Then according to question, 3x²+4y²+5xy+20-q = -x² – y² +6xy+20? ⇒ q= 3x²+4y²+5xy+20-(-x² – y² +6xy+20) ⇒ q= 3x²+4y²+5xy+20 + x² + y² + 6xy-20 ⇒ q= 3x² +x²-4y²+y²+5xy-6xy+20-20 ⇒ q= 4x²-3y²-xy+0 Hence, 4x²-3y²-xy should be subtracted. Class 7 Maths Chapter 12 Exercise 12.Read more
Let q should be subtracted.
Then according to question,
3x²+4y²+5xy+20-q = -x² – y² +6xy+20?
⇒ q= 3x²+4y²+5xy+20-(-x² – y² +6xy+20)
⇒ q= 3x²+4y²+5xy+20 + x² + y² + 6xy-20
⇒ q= 3x² +x²-4y²+y²+5xy-6xy+20-20
⇒ q= 4x²-3y²-xy+0
Hence, 4x²-3y²-xy should be subtracted.
Let p should be added. Then according to question, x²+xy+y²+p=2x²+3xy ⇒ p = 2x² + 3xy -(x²+xy+y²) ⇒ p = 2x² + 3xy -x²+xy-y² ⇒ p = 2x²- x² - y² + 3xy - xy ⇒ p = x² - y² +2xy Hence, x²-y²+2xy should be added. Class 7 Maths Chapter 12 Exercise 12.2 for more answers vist to: https://www.tiwariacademy.coRead more
Let p should be added.
Then according to question,
x²+xy+y²+p=2x²+3xy
⇒ p = 2x² + 3xy -(x²+xy+y²)
⇒ p = 2x² + 3xy -x²+xy-y²
⇒ p = 2x²- x² – y² + 3xy – xy
⇒ p = x² – y² +2xy
Hence, x²-y²+2xy should be added.
y²-(-5y²) = y²+5y² = 6y² Class 7 Maths Chapter 12 Exercise 12.2 for more answers vist to: https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
3mn,-5mn,8mn-4mn = 3mn+(-5mn)+8mn+(-4mn) = (3-5+8-4)mn = 2mn Class 7 Maths Chapter 12 Exercise 12.2 for more answers vist to: https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
Your answer is awaiting moderation. 21b-32+7b-20b = 21b+7b-20b-32 = 28b-20b-32 = 8b-32 Class 7 Maths Chapter 12 Exercise 12.2 for more answers vist to: https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
Your answer is awaiting moderation.
21b-32+7b-20b = 21b+7b-20b-32
= 28b-20b-32 = 8b-32
S.No. Pair of terms Like / Unlike terms (i) 1.100 Like terms (ii) -7x,5/2x Like terms (iii) -29x,-29y Unlike terms Class 7 Maths Chapter 12 Exercise 12.1 for more answers vist to: https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
S.No. Pair of terms Like / Unlike terms
(i) 1.100 Like terms
(ii) -7x,5/2x Like terms
(iii) -29x,-29y Unlike terms
S.No. Expression Type of Polynomial (i) 4y - 7z Binomial (ii) y² Monomial (iii) x + y - xy Trinomial (iv) 100 Monomial Class 7 Maths Chapter 12 Exercise 12.1 for more answers vist to: https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
S.No. Expression Type of Polynomial
(i) 4y – 7z Binomial
(ii) y² Monomial
(iii) x + y – xy Trinomial
(iv) 100 Monomial
(a) S.No. Expression Term with factor x Coefficient of x (i) y²x+y y²x y² (ii) 13y²-8yx -8yx -8y (b) No. Expression Term contains y² Coefficient of y² (i) 8-xy² -xy² -x (ii) 5y²+7x 5y² 5 Class 7 Maths Chapter 12 Exercise 12.1 for more answers vist to: https://www.tiwariacademy.com/ncert-solutions/clRead more
(a)
S.No. Expression Term with factor x Coefficient of x
(i) y²x+y y²x y²
(ii) 13y²-8yx -8yx -8y
(b)
No. Expression Term contains y² Coefficient of y²
(i) 8-xy² -xy² -x
(ii) 5y²+7x 5y² 5
S.No. Expression Terms Numerical Coefficient (i) 5-3t² -3t² -3 Class 7 Maths Chapter 12 Exercise 12.1 for more answers vist to: https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
(i) (a) x-3 Expression Terms Factors (ii) (a) -4x + 5 Terms: -4x,5 Factors: -4, x ; 5 Class 7 Maths Chapter 12 Exercise 12.1 for more answers vist to: https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
(i) (a) x-3
Expression
Terms
Factors
(ii) (a) -4x + 5
Terms: -4x,5
Factors: -4, x ; 5
What should be taken away from 3x² +4y²+5xy+20 to obtain -x² – y² +6xy+20?
Let q should be subtracted. Then according to question, 3x²+4y²+5xy+20-q = -x² – y² +6xy+20? ⇒ q= 3x²+4y²+5xy+20-(-x² – y² +6xy+20) ⇒ q= 3x²+4y²+5xy+20 + x² + y² + 6xy-20 ⇒ q= 3x² +x²-4y²+y²+5xy-6xy+20-20 ⇒ q= 4x²-3y²-xy+0 Hence, 4x²-3y²-xy should be subtracted. Class 7 Maths Chapter 12 Exercise 12.Read more
Let q should be subtracted.
Then according to question,
3x²+4y²+5xy+20-q = -x² – y² +6xy+20?
⇒ q= 3x²+4y²+5xy+20-(-x² – y² +6xy+20)
⇒ q= 3x²+4y²+5xy+20 + x² + y² + 6xy-20
⇒ q= 3x² +x²-4y²+y²+5xy-6xy+20-20
⇒ q= 4x²-3y²-xy+0
Hence, 4x²-3y²-xy should be subtracted.
Class 7 Maths Chapter 12 Exercise 12.2
for more answers vist to:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
What should be added to x²+ 6xy+y² to obtain 2x²+3xy?
Let p should be added. Then according to question, x²+xy+y²+p=2x²+3xy ⇒ p = 2x² + 3xy -(x²+xy+y²) ⇒ p = 2x² + 3xy -x²+xy-y² ⇒ p = 2x²- x² - y² + 3xy - xy ⇒ p = x² - y² +2xy Hence, x²-y²+2xy should be added. Class 7 Maths Chapter 12 Exercise 12.2 for more answers vist to: https://www.tiwariacademy.coRead more
Let p should be added.
Then according to question,
x²+xy+y²+p=2x²+3xy
⇒ p = 2x² + 3xy -(x²+xy+y²)
⇒ p = 2x² + 3xy -x²+xy-y²
⇒ p = 2x²- x² – y² + 3xy – xy
⇒ p = x² – y² +2xy
Hence, x²-y²+2xy should be added.
Class 7 Maths Chapter 12 Exercise 12.2
for more answers vist to:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
Subtract: -5y² from y²
y²-(-5y²) = y²+5y² = 6y² Class 7 Maths Chapter 12 Exercise 12.2 for more answers vist to: https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
y²-(-5y²) = y²+5y²
= 6y²
Class 7 Maths Chapter 12 Exercise 12.2
for more answers vist to:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
Add: 3mn, -5mn,8mn-4mn
3mn,-5mn,8mn-4mn = 3mn+(-5mn)+8mn+(-4mn) = (3-5+8-4)mn = 2mn Class 7 Maths Chapter 12 Exercise 12.2 for more answers vist to: https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
3mn,-5mn,8mn-4mn = 3mn+(-5mn)+8mn+(-4mn)
= (3-5+8-4)mn = 2mn
Class 7 Maths Chapter 12 Exercise 12.2
for more answers vist to:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
Simplify combining like terms: 21b-32+7b-20b
Your answer is awaiting moderation. 21b-32+7b-20b = 21b+7b-20b-32 = 28b-20b-32 = 8b-32 Class 7 Maths Chapter 12 Exercise 12.2 for more answers vist to: https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
Your answer is awaiting moderation.
21b-32+7b-20b = 21b+7b-20b-32
= 28b-20b-32 = 8b-32
Class 7 Maths Chapter 12 Exercise 12.2
for more answers vist to:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
State whether a given pair of terms is of like or unlike terms: (i) 1, 100 (ii) -7x,5/2(x) (iii) -29x,-29y
S.No. Pair of terms Like / Unlike terms (i) 1.100 Like terms (ii) -7x,5/2x Like terms (iii) -29x,-29y Unlike terms Class 7 Maths Chapter 12 Exercise 12.1 for more answers vist to: https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
S.No. Pair of terms Like / Unlike terms
(i) 1.100 Like terms
(ii) -7x,5/2x Like terms
(iii) -29x,-29y Unlike terms
Class 7 Maths Chapter 12 Exercise 12.1
for more answers vist to:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
Classify into monomials, binomials and trinomials: (i) 4y-7x (ii) y² (iii) x+y-xy (iv) 100
S.No. Expression Type of Polynomial (i) 4y - 7z Binomial (ii) y² Monomial (iii) x + y - xy Trinomial (iv) 100 Monomial Class 7 Maths Chapter 12 Exercise 12.1 for more answers vist to: https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
S.No. Expression Type of Polynomial
(i) 4y – 7z Binomial
(ii) y² Monomial
(iii) x + y – xy Trinomial
(iv) 100 Monomial
Class 7 Maths Chapter 12 Exercise 12.1
for more answers vist to:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
(a) Identify terms which contain x and give the coefficient of x. (i) y²x + y (ii) 13y²-8yx (b) Identify terms which contain y² and give the coefficient of y². (i) 8-xy² (ii) 5y²+7x
(a) S.No. Expression Term with factor x Coefficient of x (i) y²x+y y²x y² (ii) 13y²-8yx -8yx -8y (b) No. Expression Term contains y² Coefficient of y² (i) 8-xy² -xy² -x (ii) 5y²+7x 5y² 5 Class 7 Maths Chapter 12 Exercise 12.1 for more answers vist to: https://www.tiwariacademy.com/ncert-solutions/clRead more
(a)
S.No. Expression Term with factor x Coefficient of x
(i) y²x+y y²x y²
(ii) 13y²-8yx -8yx -8y
(b)
No. Expression Term contains y² Coefficient of y²
(i) 8-xy² -xy² -x
(ii) 5y²+7x 5y² 5
Class 7 Maths Chapter 12 Exercise 12.1
for more answers vist to:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
Identify the numerical coefficients of terms (other than constants) in the following expressions: 5-3t²
S.No. Expression Terms Numerical Coefficient (i) 5-3t² -3t² -3 Class 7 Maths Chapter 12 Exercise 12.1 for more answers vist to: https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
S.No. Expression Terms Numerical Coefficient
(i) 5-3t² -3t² -3
Class 7 Maths Chapter 12 Exercise 12.1
for more answers vist to:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
(i) Identify the terms and their factors in the following expressions, show the terms and factors by tree diagram: (a) x-3 (ii) Identify the terms and factors in the expressions given below: (a) -4x + 5
(i) (a) x-3 Expression Terms Factors (ii) (a) -4x + 5 Terms: -4x,5 Factors: -4, x ; 5 Class 7 Maths Chapter 12 Exercise 12.1 for more answers vist to: https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/
(i) (a) x-3
Expression
Terms
Factors
(ii) (a) -4x + 5
Terms: -4x,5
Factors: -4, x ; 5
Class 7 Maths Chapter 12 Exercise 12.1
for more answers vist to:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-12/