Exercise 6 (B), Composite Mathematics class 7th by S.K. Gupta and Anubhuti Gangal

 

Hello Everyone welcome to UTUG Education. We will see the solution of Composite Mathematics class 7^th by S.K. Gupta and Anubhuti Gangal of S.Chand School Publication.

This is your Chapter – 6 , Algebraic Expression of the book this is the part of Algebra unit which is your 2^nd unit of the book.

Key Facts:- 

• Algebraic Expression represent mathematical ideas and operation in a short way using symbols and variables.
• Constant:- A symbol in algebra which has a fixed value for example 8,-6,0 etc. all are constants.
• Variable:- A symbol which can assigned different numerical values is called variable. 
• Like terms:- Like terms or similar terms are terms which have the same literal factor. They may differ in their numerical coefficients. For example 5a , 3a and 7 a (the literal factor is a in each term)
• Unlike terms:- Unlike terms are terms which have the different literal factors. For example 5a and 2b
• A simple expression or a monomial is an algebraic expre²ssion of one term. e.g. -mn or 3x²
• A binomial is an algebraic expression of two terms. e.g. 2b + 3 or 5p - 7q
• A trinomial is an algebraic expression of three terms.
• A compound expression or a polynomial is an algebraic expression of two or more terms.

Polynomial

An algebraic expression of the form  a + bx + cx² + dx³ +.......... where a, b, c, d are constant and x is a variable is called a polynomial in x.

The degree of the polynomial is the greatest power of the variable present in the polynomial.

For e.g.

• 6 - 7x is a polynomial in x of degree 1.
• 7x² + 2x + 5 is a polynomial in x of degree 2.

Exercise 6 (B)

 

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