# NCERT Solutions For Class 8 Maths Chapter 9 Algebraic Expressions and Identities Ex 9.1

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Textbook | NCERT |

Board | CBSE |

Category | NCERT Solutions |

Class | Class 8 |

Subject | Maths |

Chapter | Chapter 9 |

Exercise | Class 8 Chapter 9 Algebraic Expressions and Identities Exercise 9.1 |

Number of Questions Solved | 4 |

## NCERT Solutions for Class 8 Maths Chapter 9 Algebraic Expressions and Identities Ex 9.1

**NCERT TEXTBOOK EXERCISES**

**Question 1. Identify the terms, their coefficients for each of the following expressions:**

**(i)** 5xyz^{2}âˆ’3zy**(ii)** 1+x+x^{2}**(iii)** 4x^{2}y^{2}âˆ’4x^{2}y^{2}z^{2}+z^{2}**(iv)** 3 â€“ pq + qr â€“ rp**(v)** x/2+y/2âˆ’xy**(vi) **0.3a â€“ 0.6ab + 0.5b.

**Solution.**

**(i)** **5xyz ^{2}âˆ’3zy**

**(ii) 1+x+x ^{2}**

**(iii) 4x ^{2}y^{2}âˆ’4x^{2}y^{2}z^{2}+z^{2}**

**(iv) 3 â€“ pq + qr â€“ rp**

**(v) x/2+y/2âˆ’xy**

**(vi)0.3a â€“ 0.6ab + 0.5b.**

**Question 2. Classify the following polynomials as monomials, binomials, trinomials. Which polynomials do not fit in any of these three categories?**

**Solution.**

**Question 3. Add the following.**

**(i)** ab â€“ be, be â€“ ca, ca â€“ ab**(ii)** a -b + ab, b â€“ c + be, c â€“ a + ac**(iii)** $2{ p }^{ 2 }{ q }^{ 2 }-3pq+4,\quad 5+7pq-3{ p }^{ 2 }{ q }^{ 2 }$**(iv)** ${ l }^{ 2 }+{ m }^{ 2 },\quad { m }^{ 2 }+{ n }^{ 2 },\quad { n }^{ 2 }+{ l }^{ 2 }$, 2lm + 2mn + 2nl.

**Solution.**

**(i)** **ab â€“ be, be â€“ ca, ca â€“ ab**

**(ii)** **a -b + ab, b â€“ c + be, c â€“ a + ac**

**(iii)** **$2{ p }^{ 2 }{ q }^{ 2 }-3pq+4,\quad 5+7pq-3{ p }^{ 2 }{ q }^{ 2 }$**

**(iv) ${ l }^{ 2 }+{ m }^{ 2 },\quad { m }^{ 2 }+{ n }^{ 2 },\quad { n }^{ 2 }+{ l }^{ 2 }$, 2lm + 2mn + 2nl.**

**Question 4.**

**(a)** Subtract 4a â€“ 7ab + 3b + 12 from 12a â€“ 9ab + 56 â€“ 3**(b)** Subtract 3xy + 5yz â€“ 7zx from 5xy â€“ 2yz â€“ 2zx + 10xyz**(c)** Subtract $4{ p }^{ 2 }q-3pq+5p{ q }^{ 2 }-8p+7q-10$ from $18-3p-11q+5pq-2p{ q }^{ 2 }+5{ p }^{ 2 }q$

**Solution.**

## NCERT Solutions for Class 8 Maths Chapter 9 Algebraic Expressions and Identities Exercise 9.1 PDF

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### Class 8 Maths Chapter 9 Algebraic Expressions and Identities

**Class 8 Maths Chapter 9 Algebraic Expressions and Identities Ex 9.1****Class 8 Maths Chapter 9 Algebraic Expressions and Identities Ex 9.2****Class 8 Maths Chapter 9 Algebraic Expressions and Identities Ex 9.3****Class 8 Maths Chapter 9 Algebraic Expressions and Identities Ex 9.4****Class 8 Maths Chapter 9 Algebraic Expressions and Identities Ex 9.5**