Algebraic Expressions and Identities - Solutions 2

CBSE Class –VIII Mathematics
NCERT Solutions
CHAPTER - 9
Algebraic Expressions and Identities (Ex. 9.2)

1. Find the product of the following pairs of monomials:
(i)        
(ii)      
(iii) 
(iv)    
(iv) 
Ans.
(i)    =  = 
(ii)  =  
(iii)  =  
(iv)  = 
(v)  =  = 0

2. Find the areas of rectangles with the following pairs of monomials as their lengths and breadths respectively:
Ans.
 (i)   Area of rectangle  
 sq. units
(ii) Area of rectangle 
 
 sq. units
(iii) Area of rectangle  = 
 
 sq. units
(iv) Area of rectangle  = 
 
 sq. units
(v) Area of rectangle  = 
 
 sq. units

3. Complete the table of products:
(i) 

Ans.
(i)
    

4. Obtain the volume of rectangular boxes with the following length, breadth and height respectively:
(i)        
(ii) 
(iii)     
(iv) 
Ans. (i)   Volume of rectangular box
 cubic units
(ii) Volume of rectangular box
 =  cubic units
(iii) Volume of rectangular box
 =  cubic units
(iv) Volume of rectangular box
=  
 cubic units

5. Obtain the product of:
(i)        
(ii) 
(iii)    
(iv) 
(v) 
Ans.
(i)    
(ii)  =  
(iii) 
 = 
(iv) 
 =
(v) =(-1)(mxmxmxnxnxp)