NCERT Solutions for Class 8 Maths Chapter 9 Algebraic Expressions and Identities Ex 9.1 are part of NCERT Solutions for Class 8 Maths. Here we have given NCERT Solutions for Class 8 Maths Chapter 9 Algebraic Expressions and Identities Ex 9.1.

- Algebraic Expressions and Identities Class 8 Ex 9.2
- Algebraic Expressions and Identities Class 8 Ex 9.3
- Algebraic Expressions and Identities Class 8 Ex 9.4
- Algebraic Expressions and Identities Class 8 Ex 9.5

Board |
CBSE |

Textbook |
NCERT |

Class |
Class 8 |

Subject |
Maths |

Chapter |
Chapter 9 |

Chapter Name |
Algebraic Expressions and Identities |

Exercise |
Ex 9.1 |

Number of Questions Solved |
4 |

Category |
NCERT Solutions |

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

**Question 1.**

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

**(i)** \({ 5xyz }^{ 2 }-3zy\)

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

**(iii)** \(4{ x }^{ 2 }{ y }^{ 2 }-4{ x }^{ 2 }{ y }^{ 2 }{ z }^{ 2 }+{ z }^{ 2 }\)

**(iv)** 3 – pq + qr – rp

**(v)** \(\frac { x }{ 2 } +\frac { y }{ 2 } -xy\)

**(vi) **0.3a – 0.6ab + 0.5b.

**Solution.**

**(i)** **\({ 5xyz }^{ 2 }-3zy\)**

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

**(iii) \(4{ x }^{ 2 }{ y }^{ 2 }-4{ x }^{ 2 }{ y }^{ 2 }{ z }^{ 2 }+{ z }^{ 2 }\)**

**(iv) 3 – pq + qr – rp**

**(v) \(\frac { x }{ 2 } +\frac { y }{ 2 } -xy\)**

**(vi)0.3a – 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 – be, be – ca, ca – ab

**(ii)** a -b + ab, b – c + be, c – 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 – be, be – ca, ca – ab**

**(ii)** **a -b + ab, b – c + be, c – 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 – 7ab + 3b + 12 from 12a – 9ab + 56 – 3

**(b)** Subtract 3xy + 5yz – 7zx from 5xy – 2yz – 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.**

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