Subtraction of Algebraic Expression


Algebraic Expression II - Concepts
Class - 6th Foundation NTSE Subjects
 
 
Concept Explanation
 

Subtraction of Algebraic Expression

The difference between two like terms is a like term with a numerical coefficient equal to the difference between the numerical coefficients of the two like terms.

Note: Unlike terms cannot be subtracted the way like terms are subtracted.

Illustration: Subtract 7 from 3xy.

Solution: As both terms in the given expression are alike. Hence expression for the given statement is 3xy - 7.

Illustration: Subtract a-b from 3a-b+4

Solution: The difference = 3a - b + 4 - (a - b)

                  = 3a - b + 4 - a + b

Observe how we look (a - b) in brackets and look care of sign in opening the bracket. Rearranging the terms to put like terms together;

The difference = 2a + (0) b + 4 = 2a + 4

Subtraction of algebraic expressions is explained in each step as follows:

  • Step I: Arrange the terms of the given expressions in the same order.
  • Step II: Write the given expressions in two rows in such a way that the like terms occur one below the other, keeping the expression to be subtracted in the second row.
  • Step III: Change the sign of each term in the lower row from + to - and from - to +.
  • Step IV: With new signs of the terms of lower row, add column wise.
  • .... (More Text Available, Login?)
    Sample Questions
    (More Questions for each concept available in Login)
    Question : 1

    Simplify : -b  from  7b

    Right Option : A
    View Explanation
    Explanation
    Question : 2

    Subtract   (3ab-b-4a)   from (-6ab+8a+7b).

    Right Option : C
    View Explanation
    Explanation
    Question : 3

    Subtract   :  -m^{2} + 5mn    from   4m^{2} - 3mn + 8

    Right Option : B
    View Explanation
    Explanation
     
    Video Link - Have a look !!!
     
    Language - English
     
     
     
    Related Videos
    Language - English


    Students / Parents Reviews [10]